diff --git a/src/charset.c b/src/charset.c
index d3ebfbf..6f39cf6 100644
--- a/src/charset.c
+++ b/src/charset.c
@@ -905,6 +905,14 @@
 vim_iswordc(c)
     int c;
 {
+    return vim_iswordc_buf(c, curbuf);
+}
+
+    int
+vim_iswordc_buf(c, buf)
+    int		c;
+    buf_T	*buf;
+{
 #ifdef FEAT_MBYTE
     if (c >= 0x100)
     {
@@ -914,7 +922,7 @@
 	    return utf_class(c) >= 2;
     }
 #endif
-    return (c > 0 && c < 0x100 && GET_CHARTAB(curbuf, c) != 0);
+    return (c > 0 && c < 0x100 && GET_CHARTAB(buf, c) != 0);
 }
 
 /*
@@ -933,7 +941,7 @@
 
 #if defined(FEAT_SYN_HL) || defined(PROTO)
     int
-vim_iswordc_buf(p, buf)
+vim_iswordp_buf(p, buf)
     char_u	*p;
     buf_T	*buf;
 {
diff --git a/src/eval.c b/src/eval.c
index 7c57557..f645e96 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -18884,7 +18884,7 @@
 #endif
     if (name[0] == '\'')			/* mark */
     {
-	pp = getmark_fnum(name[1], FALSE, fnum);
+	pp = getmark_buf_fnum(curbuf, name[1], FALSE, fnum);
 	if (pp == NULL || pp == (pos_T *)-1 || pp->lnum <= 0)
 	    return NULL;
 	return pp;
diff --git a/src/mark.c b/src/mark.c
index 9b304f3..540f70b 100644
--- a/src/mark.c
+++ b/src/mark.c
@@ -304,7 +304,7 @@
 #endif
 
 /*
- * Find mark "c".
+ * Find mark "c" in buffer pointed to by "buf".
  * If "changefile" is TRUE it's allowed to edit another file for '0, 'A, etc.
  * If "fnum" is not NULL store the fnum there for '0, 'A etc., don't edit
  * another file.
@@ -315,15 +315,25 @@
  * - -1 if mark is in other file and jumped there (only if changefile is TRUE)
  */
     pos_T *
+getmark_buf(buf, c, changefile)
+    buf_T	*buf;
+    int		c;
+    int		changefile;
+{
+    return getmark_buf_fnum(buf, c, changefile, NULL);
+}
+
+    pos_T *
 getmark(c, changefile)
     int		c;
     int		changefile;
 {
-    return getmark_fnum(c, changefile, NULL);
+    return getmark_buf_fnum(curbuf, c, changefile, NULL);
 }
 
     pos_T *
-getmark_fnum(c, changefile, fnum)
+getmark_buf_fnum(buf, c, changefile, fnum)
+    buf_T	*buf;
     int		c;
     int		changefile;
     int		*fnum;
@@ -351,15 +361,15 @@
 	posp = &pos_copy;		/*   w_pcmark may be changed soon */
     }
     else if (c == '"')			/* to pos when leaving buffer */
-	posp = &(curbuf->b_last_cursor);
+	posp = &(buf->b_last_cursor);
     else if (c == '^')			/* to where Insert mode stopped */
-	posp = &(curbuf->b_last_insert);
+	posp = &(buf->b_last_insert);
     else if (c == '.')			/* to where last change was made */
-	posp = &(curbuf->b_last_change);
+	posp = &(buf->b_last_change);
     else if (c == '[')			/* to start of previous operator */
-	posp = &(curbuf->b_op_start);
+	posp = &(buf->b_op_start);
     else if (c == ']')			/* to end of previous operator */
-	posp = &(curbuf->b_op_end);
+	posp = &(buf->b_op_end);
     else if (c == '{' || c == '}')	/* to previous/next paragraph */
     {
 	pos_T	pos;
@@ -395,8 +405,8 @@
 #ifdef FEAT_VISUAL
     else if (c == '<' || c == '>')	/* start/end of visual area */
     {
-	startp = &curbuf->b_visual.vi_start;
-	endp = &curbuf->b_visual.vi_end;
+	startp = &buf->b_visual.vi_start;
+	endp = &buf->b_visual.vi_end;
 	if ((c == '<') == lt(*startp, *endp))
 	    posp = startp;
 	else
@@ -404,7 +414,7 @@
 	/*
 	 * For Visual line mode, set mark at begin or end of line
 	 */
-	if (curbuf->b_visual.vi_mode == 'V')
+	if (buf->b_visual.vi_mode == 'V')
 	{
 	    pos_copy = *posp;
 	    posp = &pos_copy;
@@ -420,7 +430,7 @@
 #endif
     else if (ASCII_ISLOWER(c))		/* normal named mark */
     {
-	posp = &(curbuf->b_namedm[c - 'a']);
+	posp = &(buf->b_namedm[c - 'a']);
     }
     else if (ASCII_ISUPPER(c) || VIM_ISDIGIT(c))	/* named file mark */
     {
@@ -435,7 +445,7 @@
 
 	if (fnum != NULL)
 	    *fnum = namedfm[c].fmark.fnum;
-	else if (namedfm[c].fmark.fnum != curbuf->b_fnum)
+	else if (namedfm[c].fmark.fnum != buf->b_fnum)
 	{
 	    /* mark is in another file */
 	    posp = &pos_copy;
diff --git a/src/proto/charset.pro b/src/proto/charset.pro
index 472f1cd..72eed4b 100644
--- a/src/proto/charset.pro
+++ b/src/proto/charset.pro
@@ -19,8 +19,9 @@
 int win_linetabsize __ARGS((win_T *wp, char_u *p, colnr_T len));
 int vim_isIDc __ARGS((int c));
 int vim_iswordc __ARGS((int c));
+int vim_iswordc_buf __ARGS((int c, buf_T *buf));
 int vim_iswordp __ARGS((char_u *p));
-int vim_iswordc_buf __ARGS((char_u *p, buf_T *buf));
+int vim_iswordp_buf __ARGS((char_u *p, buf_T *buf));
 int vim_isfilec __ARGS((int c));
 int vim_isfilec_or_wc __ARGS((int c));
 int vim_isprintc __ARGS((int c));
diff --git a/src/proto/mark.pro b/src/proto/mark.pro
index 1457829..e8cef9d 100644
--- a/src/proto/mark.pro
+++ b/src/proto/mark.pro
@@ -5,8 +5,9 @@
 void checkpcmark __ARGS((void));
 pos_T *movemark __ARGS((int count));
 pos_T *movechangelist __ARGS((int count));
+pos_T *getmark_buf __ARGS((buf_T *buf, int c, int changefile));
 pos_T *getmark __ARGS((int c, int changefile));
-pos_T *getmark_fnum __ARGS((int c, int changefile, int *fnum));
+pos_T *getmark_buf_fnum __ARGS((buf_T *buf, int c, int changefile, int *fnum));
 pos_T *getnextmark __ARGS((pos_T *startpos, int dir, int begin_line));
 void fmarks_check_names __ARGS((buf_T *buf));
 int check_mark __ARGS((pos_T *pos));
diff --git a/src/regexp.c b/src/regexp.c
index b078de3..bb63c94 100644
--- a/src/regexp.c
+++ b/src/regexp.c
@@ -3623,7 +3623,6 @@
     proftime_T	*tm;		/* timeout limit or NULL */
 {
     long	r;
-    buf_T	*save_curbuf = curbuf;
 
     reg_match = NULL;
     reg_mmatch = rmp;
@@ -3638,10 +3637,7 @@
 #endif
     ireg_maxcol = rmp->rmm_maxcol;
 
-    /* Need to switch to buffer "buf" to make vim_iswordc() work. */
-    curbuf = buf;
     r = vim_regexec_both(NULL, col, tm);
-    curbuf = save_curbuf;
 
     return r;
 }
@@ -4185,7 +4181,7 @@
 		int	cmp = OPERAND(scan)[1];
 		pos_T	*pos;
 
-		pos = getmark(mark, FALSE);
+		pos = getmark_buf(reg_buf, mark, FALSE);
 		if (pos == NULL		     /* mark doesn't exist */
 			|| pos->lnum <= 0    /* mark isn't set (in curbuf) */
 			|| (pos->lnum == reglnum + reg_firstlnum
@@ -4315,8 +4311,8 @@
 #endif
 	    else
 	    {
-		if (!vim_iswordc(c)
-			|| (reginput > regline && vim_iswordc(reginput[-1])))
+		if (!vim_iswordc_buf(c, reg_buf)
+			|| (reginput > regline && vim_iswordc_buf(reginput[-1], reg_buf)))
 		    status = RA_NOMATCH;
 	    }
 	    break;
@@ -4339,8 +4335,8 @@
 #endif
 	    else
 	    {
-		if (!vim_iswordc(reginput[-1])
-			|| (reginput[0] != NUL && vim_iswordc(c)))
+		if (!vim_iswordc_buf(reginput[-1], reg_buf)
+			|| (reginput[0] != NUL && vim_iswordc_buf(c, reg_buf)))
 		    status = RA_NOMATCH;
 	    }
 	    break; /* Matched with EOW */
diff --git a/src/syntax.c b/src/syntax.c
index 4adbaf0..8e2930c 100644
--- a/src/syntax.c
+++ b/src/syntax.c
@@ -1954,9 +1954,9 @@
 	    if (do_keywords)
 	    {
 	      line = syn_getcurline();
-	      if (vim_iswordc_buf(line + current_col, syn_buf)
+	      if (vim_iswordp_buf(line + current_col, syn_buf)
 		      && (current_col == 0
-			  || !vim_iswordc_buf(line + current_col - 1
+			  || !vim_iswordp_buf(line + current_col - 1
 #ifdef FEAT_MBYTE
 			      - (has_mbyte
 				  ? (*mb_head_off)(line, line + current_col - 1)
@@ -3280,7 +3280,7 @@
 #endif
 	    ++kwlen;
     }
-    while (vim_iswordc_buf(kwp + kwlen, syn_buf));
+    while (vim_iswordp_buf(kwp + kwlen, syn_buf));
 
     if (kwlen > MAXKEYWLEN)
 	return 0;
diff --git a/src/version.c b/src/version.c
index 725506e..03a4833 100644
--- a/src/version.c
+++ b/src/version.c
@@ -726,6 +726,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    776,
+/**/
     775,
 /**/
     774,