diff --git a/src/if_py_both.h b/src/if_py_both.h
index 07eedb5..c7870bc 100644
--- a/src/if_py_both.h
+++ b/src/if_py_both.h
@@ -534,7 +534,6 @@
     {
 	long lnum;
 	long col;
-	long len;
 
 	if (!PyArg_Parse(val, "(ll)", &lnum, &col))
 	    return -1;
@@ -549,18 +548,15 @@
 	if (VimErrorCheck())
 	    return -1;
 
-	/* When column is out of range silently correct it. */
-	len = (long)STRLEN(ml_get_buf(this->win->w_buffer, lnum, FALSE));
-	if (col > len)
-	    col = len;
-
 	this->win->w_cursor.lnum = lnum;
 	this->win->w_cursor.col = col;
 #ifdef FEAT_VIRTUALEDIT
 	this->win->w_cursor.coladd = 0;
 #endif
-	update_screen(VALID);
+	/* When column is out of range silently correct it. */
+	check_cursor_col_win(this->win);
 
+	update_screen(VALID);
 	return 0;
     }
     else if (strcmp(name, "height") == 0)
diff --git a/src/mbyte.c b/src/mbyte.c
index ce0c897..6e0dbf6 100644
--- a/src/mbyte.c
+++ b/src/mbyte.c
@@ -3563,7 +3563,7 @@
     void
 mb_adjust_cursor()
 {
-    mb_adjustpos(&curwin->w_cursor);
+    mb_adjustpos(curbuf, &curwin->w_cursor);
 }
 
 /*
@@ -3571,7 +3571,8 @@
  * If it points to a tail byte it's moved backwards to the head byte.
  */
     void
-mb_adjustpos(lp)
+mb_adjustpos(buf, lp)
+    buf_T	*buf;
     pos_T	*lp;
 {
     char_u	*p;
@@ -3582,7 +3583,7 @@
 #endif
 	    )
     {
-	p = ml_get(lp->lnum);
+	p = ml_get_buf(buf, lp->lnum, FALSE);
 	lp->col -= (*mb_head_off)(p, p + lp->col);
 #ifdef FEAT_VIRTUALEDIT
 	/* Reset "coladd" when the cursor would be on the right half of a
diff --git a/src/misc2.c b/src/misc2.c
index c6207ff..9479a53 100644
--- a/src/misc2.c
+++ b/src/misc2.c
@@ -333,7 +333,7 @@
 #ifdef FEAT_MBYTE
     /* prevent from moving onto a trail byte */
     if (has_mbyte)
-	mb_adjustpos(pos);
+	mb_adjustpos(curbuf, pos);
 #endif
 
     if (col < wcol)
@@ -544,16 +544,26 @@
     void
 check_cursor_col()
 {
+    check_cursor_col_win(curwin);
+}
+
+/*
+ * Make sure win->w_cursor.col is valid.
+ */
+    void
+check_cursor_col_win(win)
+    win_T *win;
+{
     colnr_T len;
 #ifdef FEAT_VIRTUALEDIT
-    colnr_T oldcol = curwin->w_cursor.col;
-    colnr_T oldcoladd = curwin->w_cursor.col + curwin->w_cursor.coladd;
+    colnr_T oldcol = win->w_cursor.col;
+    colnr_T oldcoladd = win->w_cursor.col + win->w_cursor.coladd;
 #endif
 
-    len = (colnr_T)STRLEN(ml_get_curline());
+    len = (colnr_T)STRLEN(ml_get_buf(win->w_buffer, win->w_cursor.lnum, FALSE));
     if (len == 0)
-	curwin->w_cursor.col = 0;
-    else if (curwin->w_cursor.col >= len)
+	win->w_cursor.col = 0;
+    else if (win->w_cursor.col >= len)
     {
 	/* Allow cursor past end-of-line when:
 	 * - in Insert mode or restarting Insert mode
@@ -567,33 +577,33 @@
 		|| (ve_flags & VE_ONEMORE)
 #endif
 		|| virtual_active())
-	    curwin->w_cursor.col = len;
+	    win->w_cursor.col = len;
 	else
 	{
-	    curwin->w_cursor.col = len - 1;
+	    win->w_cursor.col = len - 1;
 #ifdef FEAT_MBYTE
-	    /* prevent cursor from moving on the trail byte */
+	    /* Move the cursor to the head byte. */
 	    if (has_mbyte)
-		mb_adjust_cursor();
+		mb_adjustpos(win->w_buffer, &win->w_cursor);
 #endif
 	}
     }
-    else if (curwin->w_cursor.col < 0)
-	curwin->w_cursor.col = 0;
+    else if (win->w_cursor.col < 0)
+	win->w_cursor.col = 0;
 
 #ifdef FEAT_VIRTUALEDIT
     /* If virtual editing is on, we can leave the cursor on the old position,
      * only we must set it to virtual.  But don't do it when at the end of the
      * line. */
     if (oldcol == MAXCOL)
-	curwin->w_cursor.coladd = 0;
+	win->w_cursor.coladd = 0;
     else if (ve_flags == VE_ALL)
     {
-	if (oldcoladd > curwin->w_cursor.col)
-	    curwin->w_cursor.coladd = oldcoladd - curwin->w_cursor.col;
+	if (oldcoladd > win->w_cursor.col)
+	    win->w_cursor.coladd = oldcoladd - win->w_cursor.col;
 	else
 	    /* avoid weird number when there is a miscalculation or overflow */
-	    curwin->w_cursor.coladd = 0;
+	    win->w_cursor.coladd = 0;
     }
 #endif
 }
diff --git a/src/normal.c b/src/normal.c
index bd6f1f2..522480f 100644
--- a/src/normal.c
+++ b/src/normal.c
@@ -8774,7 +8774,7 @@
 	{
 	    --pp->col;
 #ifdef FEAT_MBYTE
-	    mb_adjustpos(pp);
+	    mb_adjustpos(curbuf, pp);
 #endif
 	}
 	else if (pp->lnum > 1)
diff --git a/src/proto/mbyte.pro b/src/proto/mbyte.pro
index 9519a19..88496cc 100644
--- a/src/proto/mbyte.pro
+++ b/src/proto/mbyte.pro
@@ -56,7 +56,7 @@
 int utf_valid_string __ARGS((char_u *s, char_u *end));
 int dbcs_screen_tail_off __ARGS((char_u *base, char_u *p));
 void mb_adjust_cursor __ARGS((void));
-void mb_adjustpos __ARGS((pos_T *lp));
+void mb_adjustpos __ARGS((buf_T *buf, pos_T *lp));
 char_u *mb_prevptr __ARGS((char_u *line, char_u *p));
 int mb_charlen __ARGS((char_u *str));
 int mb_charlen_len __ARGS((char_u *str, int len));
diff --git a/src/proto/misc2.pro b/src/proto/misc2.pro
index 720d263..a22ba7f 100644
--- a/src/proto/misc2.pro
+++ b/src/proto/misc2.pro
@@ -14,6 +14,7 @@
 linenr_T get_cursor_rel_lnum __ARGS((win_T *wp, linenr_T lnum));
 void check_cursor_lnum __ARGS((void));
 void check_cursor_col __ARGS((void));
+void check_cursor_col_win __ARGS((win_T *win));
 void check_cursor __ARGS((void));
 void adjust_cursor_col __ARGS((void));
 int leftcol_changed __ARGS((void));
diff --git a/src/version.c b/src/version.c
index 92612ad..8af816c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -710,6 +710,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    239,
+/**/
     238,
 /**/
     237,