diff --git a/src/gui.c b/src/gui.c
index 4c7c775..208b721 100644
--- a/src/gui.c
+++ b/src/gui.c
@@ -591,7 +591,7 @@
 	/* When 'cmdheight' was set during startup it may not have taken
 	 * effect yet. */
 	if (p_ch != 1L)
-	    command_height(-1L);
+	    command_height();
 
 	return;
     }
@@ -3497,6 +3497,25 @@
     return TRUE;
 }
 
+/*
+ * Send a tabline menu event
+ */
+    void
+send_tabline_menu_event(tabidx, event)
+    int	    tabidx;
+    int	    event;
+{
+    char_u	    string[3];
+
+    string[0] = CSI;
+    string[1] = KS_TABMENU;
+    string[2] = KE_FILLER;
+    add_to_input_buf(string, 3);
+    string[0] = tabidx;
+    string[1] = (char_u)(long)event;
+    add_to_input_buf_csi(string, 2);
+}
+
 #endif
 
 /*
diff --git a/src/gui_gtk_x11.c b/src/gui_gtk_x11.c
index 832933a..adb603a 100644
--- a/src/gui_gtk_x11.c
+++ b/src/gui_gtk_x11.c
@@ -3128,16 +3128,9 @@
     static void
 tabline_menu_handler(GtkMenuItem *item, gpointer user_data)
 {
-    char_u	string[3];
 
     /* Add the string cmd into input buffer */
-    string[0] = CSI;
-    string[1] = KS_TABMENU;
-    string[2] = KE_FILLER;
-    add_to_input_buf(string, 3);
-    string[0] = clicked_page;
-    string[1] = (char_u)(long)user_data;
-    add_to_input_buf_csi(string, 2);
+    send_tabline_menu_event(clicked_page, (int)(long)user_data);
 
     if (gtk_main_level() > 0)
 	gtk_main_quit();
diff --git a/src/gui_motif.c b/src/gui_motif.c
index a98c9d1..4caecc3 100644
--- a/src/gui_motif.c
+++ b/src/gui_motif.c
@@ -27,6 +27,7 @@
 #include <Xm/ToggleBG.h>
 #include <Xm/SeparatoG.h>
 #include <Xm/Notebook.h>
+#include <Xm/XmP.h>
 
 #include <X11/keysym.h>
 #include <X11/Xatom.h>
@@ -151,19 +152,52 @@
     Widget	w;
     XtPointer	client_data, call_data;
 {
-    char_u	string[3];
     int		cmd, tab_idx;
 
     XtVaGetValues(w, XmNuserData, &cmd, NULL);
     XtVaGetValues(tabLine_menu, XmNuserData, &tab_idx, NULL);
 
-    string[0] = CSI;
-    string[1] = KS_TABMENU;
-    string[2] = KE_FILLER;
-    add_to_input_buf(string, 3);
-    string[0] = tab_idx;
-    string[1] = (char_u)(long)cmd;
-    add_to_input_buf_csi(string, 2);
+    send_tabline_menu_event(tab_idx, cmd);
+}
+
+/*
+ * Tabline single mouse click timeout handler
+ */
+/*ARGSUSED*/
+    static void
+motif_tabline_timer_cb (timed_out, interval_id)
+    XtPointer		timed_out;
+    XtIntervalId	*interval_id;
+{
+    *((int *)timed_out) = TRUE;
+}
+
+/*
+ * check if the tabline tab scroller is clicked
+ */
+    static int
+tabline_scroller_clicked(scroller_name, event)
+    char		*scroller_name;
+    XButtonPressedEvent *event;
+{
+    Widget	tab_scroll_w;
+    Position	pos_x, pos_y;
+    Dimension	width, height;
+
+    tab_scroll_w = XtNameToWidget(tabLine, scroller_name);
+    if (tab_scroll_w != (Widget)0) {
+	XtVaGetValues(tab_scroll_w, XmNx, &pos_x, XmNy, &pos_y, XmNwidth,
+		      &width, XmNheight, &height, NULL);
+	if (pos_x >= 0) {
+	    /* Tab scroller (next) is visible */
+	    if ((event->x >= pos_x) && (event->x <= pos_x + width) &&
+		(event->y >= pos_y) && (event->y <= pos_y + height)) {
+		/* Clicked on the scroller */
+		return TRUE;
+	    }
+	}
+    }
+    return FALSE;
 }
 
 /*ARGSUSED*/
@@ -179,15 +213,47 @@
     int				tab_idx = 0;
     WidgetList			children;
     Cardinal			numChildren;
+    static XtIntervalId		timer = (XtIntervalId)0;
+    static int			timed_out = TRUE;
 
     event = (XButtonPressedEvent *)e;
 
+    if (event->button == Button1)
+    {
+	if (tabline_scroller_clicked("MajorTabScrollerNext", event)
+	    || tabline_scroller_clicked("MajorTabScrollerPrevious", event))
+	    return;
+
+	if (!timed_out)
+	{
+	    XtRemoveTimeOut(timer);
+	    timed_out = TRUE;
+
+	    /*
+	     * Double click on the tabline gutter, add a new tab
+	     */
+	    send_tabline_menu_event(0, TABLINE_MENU_NEW);
+	}
+	else
+	{
+	    /*
+	     * Single click on the tabline gutter, start a timer to check
+	     * for double clicks
+	     */
+	    timer = XtAppAddTimeOut(app_context, (long_u)p_mouset,
+				    motif_tabline_timer_cb, &timed_out);
+	    timed_out = FALSE;
+	}
+	return;
+    }
+
     if (event->button != Button3)
 	return;
 
     if (event->subwindow != None)
     {
 	tab_w = XtWindowToWidget(XtDisplay(w), event->subwindow);
+	/* LINTED: avoid warning: dubious operation on enum */
 	if (tab_w != (Widget)0 && XmIsPushButton(tab_w))
 	    XtVaGetValues(tab_w, XmNpageNumber, &tab_idx, NULL);
     }
@@ -3169,6 +3235,9 @@
 	{
 	    XtManageChild(tabLine);
 	    XtUnmanageChild(XtNameToWidget(tabLine, "PageScroller"));
+	    XtUnmanageChild(XtNameToWidget(tabLine, "MinorTabScrollerNext"));
+	    XtUnmanageChild(XtNameToWidget(tabLine,
+					   "MinorTabScrollerPrevious"));
 #ifdef FEAT_MENU
 # ifdef FEAT_TOOLBAR
 	    if (XtIsManaged(XtParent(toolBar)))
@@ -3237,6 +3306,8 @@
     XmNotebookPageInfo	page_info;
     XmNotebookPageStatus page_status;
     int			last_page, tab_count;
+    XmString		label_str;
+    char		*label_cstr;
 
     if (tabLine == (Widget)0)
 	return;
@@ -3265,9 +3336,25 @@
 	    tab = page_info.major_tab_widget;
 
 	XtVaSetValues(tab, XmNpageNumber, nr, NULL);
-	get_tabline_label(tp);
-	XtVaSetValues(tab, XtVaTypedArg, XmNlabelString, XmRString,
-		      NameBuff, STRLEN(NameBuff) + 1, NULL);
+
+	/*
+	 * Change the label text only if it is different
+	 */
+	XtVaGetValues(tab, XmNlabelString, &label_str, NULL);
+	if (XmStringGetLtoR(label_str, XmSTRING_DEFAULT_CHARSET, &label_cstr))
+	{
+	    get_tabline_label(tp);
+	    if (STRCMP(label_cstr, NameBuff) != 0) {
+		XtVaSetValues(tab, XtVaTypedArg, XmNlabelString, XmRString,
+			      NameBuff, STRLEN(NameBuff) + 1, NULL);
+		/*
+		 * Force a resize of the tab label button
+		 */
+		XtUnmanageChild(tab);
+		XtManageChild(tab);
+	    }
+	    XtFree(label_cstr);
+	}
     }
 
     tab_count = nr - 1;
diff --git a/src/gui_w32.c b/src/gui_w32.c
index 0e6e857..21b757b 100644
--- a/src/gui_w32.c
+++ b/src/gui_w32.c
@@ -740,17 +740,7 @@
 		GetCursorPos((LPPOINT)&pt);
 		GetWindowRect(s_textArea, &rect);
 		if (pt.y < rect.top)
-		{
-		    char_u	    string[3];
-
-		    string[0] = CSI;
-		    string[1] = KS_TABMENU;
-		    string[2] = KE_FILLER;
-		    add_to_input_buf(string, 3);
-		    string[0] = 0;
-		    string[1] = (char_u)(long)TABLINE_MENU_NEW;
-		    add_to_input_buf_csi(string, 2);
-		}
+		    send_tabline_menu_event(0, TABLINE_MENU_NEW);
 	    }
 	    return MyWindowProc(hwnd, uMsg, wParam, lParam);
 	}
diff --git a/src/gui_w48.c b/src/gui_w48.c
index b940a27..7592c7f 100644
--- a/src/gui_w48.c
+++ b/src/gui_w48.c
@@ -1120,6 +1120,7 @@
     if (showing_tabline)
     {
 	int	top = 0;
+	RECT	rect;
 
 #ifdef FEAT_TOOLBAR
 	if (vim_strchr(p_go, GO_TOOLBAR) != NULL)
@@ -2191,7 +2192,6 @@
     MENUITEMINFO    minfo;
     long	    rval;
     POINT	    pt;
-    char_u	    string[3];
 
     tab_pmenu = CreatePopupMenu();
     if (tab_pmenu == NULL)
@@ -2236,13 +2236,7 @@
 	else
 	    idx += 1;
 
-	string[0] = CSI;
-	string[1] = KS_TABMENU;
-	string[2] = KE_FILLER;
-	add_to_input_buf(string, 3);
-	string[0] = idx;
-	string[1] = (char_u)(long)rval;
-	add_to_input_buf_csi(string, 2);
+	send_tabline_menu_event(idx, (int)rval);
     }
 }
 
diff --git a/src/option.c b/src/option.c
index f809a73..8ed4f34 100644
--- a/src/option.c
+++ b/src/option.c
@@ -7743,7 +7743,7 @@
 		&& !gui.starting
 #endif
 	   )
-	    command_height(old_value);
+	    command_height();
     }
 
     /* when 'updatecount' changes from zero to non-zero, open swap files */
diff --git a/src/proto/gui.pro b/src/proto/gui.pro
index b926eb0..7105a6f 100644
--- a/src/proto/gui.pro
+++ b/src/proto/gui.pro
@@ -38,6 +38,7 @@
 extern void gui_update_tabline __ARGS((void));
 extern void get_tabline_label __ARGS((tabpage_T *tp));
 extern int send_tabline_event __ARGS((int nr));
+extern void send_tabline_menu_event __ARGS((int tabidx, int event));
 extern void gui_remove_scrollbars __ARGS((void));
 extern void gui_create_scrollbar __ARGS((scrollbar_T *sb, int type, win_T *wp));
 extern scrollbar_T *gui_find_scrollbar __ARGS((long ident));
diff --git a/src/proto/window.pro b/src/proto/window.pro
index 362f00a..f0ca77b 100644
--- a/src/proto/window.pro
+++ b/src/proto/window.pro
@@ -1,59 +1,59 @@
 /* window.c */
-extern void do_window __ARGS((int nchar, long Prenum, int xchar));
-extern int win_split __ARGS((int size, int flags));
-extern int win_valid __ARGS((win_T *win));
-extern int win_count __ARGS((void));
-extern int make_windows __ARGS((int count, int vertical));
-extern void win_move_after __ARGS((win_T *win1, win_T *win2));
-extern void win_equal __ARGS((win_T *next_curwin, int current, int dir));
-extern void close_windows __ARGS((buf_T *buf, int keep_curwin));
-extern void win_close __ARGS((win_T *win, int free_buf));
-extern void win_close_othertab __ARGS((win_T *win, int free_buf, tabpage_T *tp));
-extern void win_free_all __ARGS((void));
-extern void close_others __ARGS((int message, int forceit));
-extern void curwin_init __ARGS((void));
-extern int win_alloc_first __ARGS((void));
-extern void win_init_size __ARGS((void));
-extern int win_new_tabpage __ARGS((int after));
-extern int may_open_tabpage __ARGS((void));
-extern int make_tabpages __ARGS((int maxcount));
-extern int valid_tabpage __ARGS((tabpage_T *tpc));
-extern tabpage_T *find_tabpage __ARGS((int n));
-extern int tabpage_index __ARGS((tabpage_T *ftp));
-extern void goto_tabpage __ARGS((int n));
-extern void goto_tabpage_tp __ARGS((tabpage_T *tp));
-extern void tabpage_move __ARGS((int nr));
-extern void win_goto __ARGS((win_T *wp));
-extern win_T *win_find_nr __ARGS((int winnr));
-extern void win_enter __ARGS((win_T *wp, int undo_sync));
-extern win_T *buf_jump_open_win __ARGS((buf_T *buf));
-extern int win_alloc_lines __ARGS((win_T *wp));
-extern void win_free_lsize __ARGS((win_T *wp));
-extern void shell_new_rows __ARGS((void));
-extern void shell_new_columns __ARGS((void));
-extern void win_size_save __ARGS((garray_T *gap));
-extern void win_size_restore __ARGS((garray_T *gap));
-extern int win_comp_pos __ARGS((void));
-extern void win_setheight __ARGS((int height));
-extern void win_setheight_win __ARGS((int height, win_T *win));
-extern void win_setwidth __ARGS((int width));
-extern void win_setwidth_win __ARGS((int width, win_T *wp));
-extern void win_setminheight __ARGS((void));
-extern void win_drag_status_line __ARGS((win_T *dragwin, int offset));
-extern void win_drag_vsep_line __ARGS((win_T *dragwin, int offset));
-extern void win_comp_scroll __ARGS((win_T *wp));
-extern void command_height __ARGS((long old_p_ch));
-extern void last_status __ARGS((int morewin));
-extern int tabline_height __ARGS((void));
-extern char_u *grab_file_name __ARGS((long count, linenr_T *file_lnum));
-extern char_u *file_name_at_cursor __ARGS((int options, long count, linenr_T *file_lnum));
-extern char_u *file_name_in_line __ARGS((char_u *line, int col, int options, long count, char_u *rel_fname, linenr_T *file_lnum));
-extern char_u *find_file_name_in_path __ARGS((char_u *ptr, int len, int options, long count, char_u *rel_fname));
-extern int path_with_url __ARGS((char_u *fname));
-extern int vim_isAbsName __ARGS((char_u *name));
-extern int vim_FullName __ARGS((char_u *fname, char_u *buf, int len, int force));
-extern int min_rows __ARGS((void));
-extern int only_one_window __ARGS((void));
-extern void check_lnums __ARGS((int do_curwin));
-extern int win_hasvertsplit __ARGS((void));
+void do_window __ARGS((int nchar, long Prenum, int xchar));
+int win_split __ARGS((int size, int flags));
+int win_valid __ARGS((win_T *win));
+int win_count __ARGS((void));
+int make_windows __ARGS((int count, int vertical));
+void win_move_after __ARGS((win_T *win1, win_T *win2));
+void win_equal __ARGS((win_T *next_curwin, int current, int dir));
+void close_windows __ARGS((buf_T *buf, int keep_curwin));
+void win_close __ARGS((win_T *win, int free_buf));
+void win_close_othertab __ARGS((win_T *win, int free_buf, tabpage_T *tp));
+void win_free_all __ARGS((void));
+void close_others __ARGS((int message, int forceit));
+void curwin_init __ARGS((void));
+int win_alloc_first __ARGS((void));
+void win_init_size __ARGS((void));
+int win_new_tabpage __ARGS((int after));
+int may_open_tabpage __ARGS((void));
+int make_tabpages __ARGS((int maxcount));
+int valid_tabpage __ARGS((tabpage_T *tpc));
+tabpage_T *find_tabpage __ARGS((int n));
+int tabpage_index __ARGS((tabpage_T *ftp));
+void goto_tabpage __ARGS((int n));
+void goto_tabpage_tp __ARGS((tabpage_T *tp));
+void tabpage_move __ARGS((int nr));
+void win_goto __ARGS((win_T *wp));
+win_T *win_find_nr __ARGS((int winnr));
+void win_enter __ARGS((win_T *wp, int undo_sync));
+win_T *buf_jump_open_win __ARGS((buf_T *buf));
+int win_alloc_lines __ARGS((win_T *wp));
+void win_free_lsize __ARGS((win_T *wp));
+void shell_new_rows __ARGS((void));
+void shell_new_columns __ARGS((void));
+void win_size_save __ARGS((garray_T *gap));
+void win_size_restore __ARGS((garray_T *gap));
+int win_comp_pos __ARGS((void));
+void win_setheight __ARGS((int height));
+void win_setheight_win __ARGS((int height, win_T *win));
+void win_setwidth __ARGS((int width));
+void win_setwidth_win __ARGS((int width, win_T *wp));
+void win_setminheight __ARGS((void));
+void win_drag_status_line __ARGS((win_T *dragwin, int offset));
+void win_drag_vsep_line __ARGS((win_T *dragwin, int offset));
+void win_comp_scroll __ARGS((win_T *wp));
+void command_height __ARGS((void));
+void last_status __ARGS((int morewin));
+int tabline_height __ARGS((void));
+char_u *grab_file_name __ARGS((long count, linenr_T *file_lnum));
+char_u *file_name_at_cursor __ARGS((int options, long count, linenr_T *file_lnum));
+char_u *file_name_in_line __ARGS((char_u *line, int col, int options, long count, char_u *rel_fname, linenr_T *file_lnum));
+char_u *find_file_name_in_path __ARGS((char_u *ptr, int len, int options, long count, char_u *rel_fname));
+int path_with_url __ARGS((char_u *fname));
+int vim_isAbsName __ARGS((char_u *name));
+int vim_FullName __ARGS((char_u *fname, char_u *buf, int len, int force));
+int min_rows __ARGS((void));
+int only_one_window __ARGS((void));
+void check_lnums __ARGS((int do_curwin));
+int win_hasvertsplit __ARGS((void));
 /* vim: set ft=c : */
diff --git a/src/structs.h b/src/structs.h
index ce3bf9b..6710b72 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -1625,6 +1625,8 @@
     win_T	    *tp_lastwin;    /* last window in this Tab page */
     long	    tp_old_Rows;    /* Rows when Tab page was left */
     long	    tp_old_Columns; /* Columns when Tab page was left */
+    long	    tp_ch_used;	    /* value of 'cmdheight' when frame size
+				       was set */
 #ifdef FEAT_GUI
     int		    tp_prev_which_scrollbars[3];
 				    /* previous value of which_scrollbars */
diff --git a/src/version.h b/src/version.h
index 993e747..a5c7e88 100644
--- a/src/version.h
+++ b/src/version.h
@@ -35,6 +35,6 @@
  */
 #define VIM_VERSION_NODOT	"vim70c"
 #define VIM_VERSION_SHORT	"7.0c"
-#define VIM_VERSION_MEDIUM	"7.0c12 BETA"
-#define VIM_VERSION_LONG	"VIM - Vi IMproved 7.0c12 BETA (2006 Apr 7)"
-#define VIM_VERSION_LONG_DATE	"VIM - Vi IMproved 7.0c12 BETA (2006 Apr 7, compiled "
+#define VIM_VERSION_MEDIUM	"7.0c13 BETA"
+#define VIM_VERSION_LONG	"VIM - Vi IMproved 7.0c13 BETA (2006 Apr 8)"
+#define VIM_VERSION_LONG_DATE	"VIM - Vi IMproved 7.0c13 BETA (2006 Apr 8, compiled "
diff --git a/src/window.c b/src/window.c
index 26003f3..5e9553b 100644
--- a/src/window.c
+++ b/src/window.c
@@ -85,8 +85,6 @@
 #define NOWIN		(win_T *)-1	/* non-exisiting window */
 
 #ifdef FEAT_WINDOWS
-static long p_ch_used = 1L;		/* value of 'cmdheight' when frame
-					   size was set */
 # define ROWS_AVAIL (Rows - p_ch - tabline_height())
 #else
 # define ROWS_AVAIL (Rows - p_ch)
@@ -3087,9 +3085,6 @@
     topframe->fr_width = Columns;
 #endif
     topframe->fr_height = Rows - p_ch;
-#ifdef FEAT_WINDOWS
-    p_ch_used = p_ch;
-#endif
     topframe->fr_win = curwin;
     curwin->w_frame = topframe;
 
@@ -3137,6 +3132,7 @@
 	/* init t: variables */
 	init_var_dict(&tp->tp_vars, &tp->tp_winvar);
 #endif
+	tp->tp_ch_used = p_ch;
     }
     return tp;
 }
@@ -3419,7 +3415,9 @@
 
     /* The tabpage line may have appeared or disappeared, may need to resize
      * the frames for that.  When the Vim window was resized need to update
-     * frame sizes too. */
+     * frame sizes too.  Use the stored value of p_ch, so that it can be
+     * different for each tab page. */
+    p_ch = curtab->tp_ch_used;
     if (curtab->tp_old_Rows != Rows || (old_off != firstwin->w_winrow
 #ifdef FEAT_GUI_TABLINE
 			    && !gui_use_tabline()
@@ -4215,7 +4213,7 @@
 #endif
     compute_cmdrow();
 #ifdef FEAT_WINDOWS
-    p_ch_used = p_ch;
+    curtab->tp_ch_used = p_ch;
 #endif
 
 #if 0
@@ -4961,6 +4959,7 @@
     p_ch = Rows - cmdline_row;
     if (p_ch < 1)
 	p_ch = 1;
+    curtab->tp_ch_used = p_ch;
     redraw_all_later(SOME_VALID);
     showmode();
 }
@@ -5257,19 +5256,17 @@
  * command_height: called whenever p_ch has been changed
  */
     void
-command_height(old_p_ch)
-    long	old_p_ch;
+command_height()
 {
 #ifdef FEAT_WINDOWS
     int		h;
     frame_T	*frp;
+    int		old_p_ch = curtab->tp_ch_used;
 
-    /* When passed a negative value use the value of p_ch that we remembered.
-     * This is needed for when the GUI starts up, we can't be sure in what
-     * order things happen. */
-    if (old_p_ch < 0)
-	old_p_ch = p_ch_used;
-    p_ch_used = p_ch;
+    /* Use the value of p_ch that we remembered.  This is needed for when the
+     * GUI starts up, we can't be sure in what order things happen.  And when
+     * p_ch was changed in another tab page. */
+    curtab->tp_ch_used = p_ch;
 
     /* Find bottom frame with width of screen. */
     frp = lastwin->w_frame;
@@ -5328,8 +5325,8 @@
     if (frp != lastwin->w_frame)
 	(void)win_comp_pos();
 #else
-    win_setheight((int)(firstwin->w_height + old_p_ch - p_ch));
     cmdline_row = Rows - p_ch;
+    win_setheight(cmdline_row);
 #endif
 }