diff --git a/7.3.830 b/7.3.830
new file mode 100644
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--- /dev/null
+++ b/7.3.830
@@ -0,0 +1,88 @@
+To: vim_dev@googlegroups.com
+Subject: Patch 7.3.830
+Fcc: outbox
+From: Bram Moolenaar <Bram@moolenaar.net>
+Mime-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+------------
+
+Patch 7.3.830
+Problem:    :mksession confuses bytes, columns and characters when positioning
+	    the cursor.
+Solution:   Use w_virtcol with "|" instead of w_cursor.col with "l".
+Files:	    src/ex_docmd.c
+
+
+*** ../vim-7.3.829/src/ex_docmd.c	2013-02-14 22:11:31.000000000 +0100
+--- src/ex_docmd.c	2013-02-20 19:13:21.000000000 +0100
+***************
+*** 10829,10852 ****
+  	    {
+  		if (fprintf(fd,
+  			  "let s:c = %ld - ((%ld * winwidth(0) + %ld) / %ld)",
+! 			    (long)wp->w_cursor.col,
+! 			    (long)(wp->w_cursor.col - wp->w_leftcol),
+  			    (long)wp->w_width / 2, (long)wp->w_width) < 0
+  			|| put_eol(fd) == FAIL
+  			|| put_line(fd, "if s:c > 0") == FAIL
+  			|| fprintf(fd,
+! 			    "  exe 'normal! 0' . s:c . 'lzs' . (%ld - s:c) . 'l'",
+! 			    (long)wp->w_cursor.col) < 0
+  			|| put_eol(fd) == FAIL
+  			|| put_line(fd, "else") == FAIL
+! 			|| fprintf(fd, "  normal! 0%dl", wp->w_cursor.col) < 0
+  			|| put_eol(fd) == FAIL
+  			|| put_line(fd, "endif") == FAIL)
+  		    return FAIL;
+  	    }
+  	    else
+  	    {
+! 		if (fprintf(fd, "normal! 0%dl", wp->w_cursor.col) < 0
+  			|| put_eol(fd) == FAIL)
+  		    return FAIL;
+  	    }
+--- 10829,10852 ----
+  	    {
+  		if (fprintf(fd,
+  			  "let s:c = %ld - ((%ld * winwidth(0) + %ld) / %ld)",
+! 			    (long)wp->w_virtcol + 1,
+! 			    (long)(wp->w_virtcol - wp->w_leftcol),
+  			    (long)wp->w_width / 2, (long)wp->w_width) < 0
+  			|| put_eol(fd) == FAIL
+  			|| put_line(fd, "if s:c > 0") == FAIL
+  			|| fprintf(fd,
+! 			    "  exe 'normal! ' . s:c . '|zs' . %ld . '|'",
+! 			    (long)wp->w_virtcol + 1) < 0
+  			|| put_eol(fd) == FAIL
+  			|| put_line(fd, "else") == FAIL
+! 			|| fprintf(fd, "  normal! %d|", wp->w_virtcol + 1) < 0
+  			|| put_eol(fd) == FAIL
+  			|| put_line(fd, "endif") == FAIL)
+  		    return FAIL;
+  	    }
+  	    else
+  	    {
+! 		if (fprintf(fd, "normal! 0%d|", wp->w_virtcol + 1) < 0
+  			|| put_eol(fd) == FAIL)
+  		    return FAIL;
+  	    }
+*** ../vim-7.3.829/src/version.c	2013-02-20 18:39:07.000000000 +0100
+--- src/version.c	2013-02-20 19:14:18.000000000 +0100
+***************
+*** 730,731 ****
+--- 730,733 ----
+  {   /* Add new patch number below this line */
++ /**/
++     830,
+  /**/
+
+-- 
+Westheimer's Discovery:
+        A couple of months in the laboratory can
+        frequently save a couple of hours in the library.
+
+ /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net   \\\
+///        sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
+\\\  an exciting new programming language -- http://www.Zimbu.org        ///
+ \\\            help me help AIDS victims -- http://ICCF-Holland.org    ///