Added hint on slow downs caused by the "matchparen" plugin.

git-svn-id: http://macvim.googlecode.com/svn/trunk@319 96c4425d-ca35-0410-94e5-3396d5c13a8f

runtime/doc/gui_mac.txt

@@ -1,4 +1,4 @@
-*gui_mac.txt*	For Vim version 7.1.  Last change: 2007 Sep 18
+*gui_mac.txt*	For Vim version 7.1.  Last change: 2007 Oct 14
 
 
 		  VIM REFERENCE MANUAL    by Bjorn Winckler
@@ -411,6 +411,16 @@ horizontally as well as vertically.
 Solution: ~
 Hold down Cmd and click the zoom button.
 
+Scenario: ~
+Typing feels sluggish when the cursor is just before a right bracket (i.e. ')',
+'}', or ']').
+Solution: ~
+Disable the "matchparen" plugin (see |matchparen|) by typing :NoMatchParen.
+If that helps, then you can permantenly disable "matchparen" by adding the
+following line to your "~/.vimrc": >
+	let loaded_matchparen=1
+<
+
 Scenario: ~
 You can't find the information on MacVim you thought should be in
 this manual page.