diff --git a/runtime/doc/vi_diff.txt b/runtime/doc/vi_diff.txt
index 78993f0..de9c477 100644
--- a/runtime/doc/vi_diff.txt
+++ b/runtime/doc/vi_diff.txt
@@ -1,4 +1,4 @@
-*vi_diff.txt*   For Vim version 7.0aa.  Last change: 2005 Feb 10
+*vi_diff.txt*   For Vim version 7.0aa.  Last change: 2005 Feb 21
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -14,7 +14,7 @@
 is ":open".  There are probably a lot of small differences (either because Vim
 is missing something or because Posix is beside the mark).
 
-1. Missing commands			|missing-commands|
+1. Simulated command			|simulated-command|
 2. Missing options			|missing-options|
 3. Limits				|limits|
 4. The most interesting additions	|vim-additions|
@@ -23,11 +23,22 @@
 7. POSIX compliance			|posix-compliance|
 
 ==============================================================================
-1. Missing commands					*missing-commands*
+1. Simulated command					*simulated-command*
 
-This command is in Vi, but not in Vim:
+This command is in Vi, but Vim only simuates it:
 
-:o[pen]			{Vi: start editing in open mode} *:o* *:op* *:open*
+							*:o* *:op* *:open*
+:[range]o[pen]			Works like |:visual|: end Ex mode.
+				{Vi: start editing in open mode}
+
+:[range]o[pen] /pattern/	As above, additionally move the cursor to the
+				column where "pattern" matches in the cursor
+				line.
+
+Vim does not support open mode, since it's not really useful.  For those
+situations where ":open" would start open mode Vim will leave Ex mode, which
+allows executing the same commands, but updates the whole screen instead of
+only one line.
 
 ==============================================================================
 2. Missing options					*missing-options*
@@ -46,7 +57,6 @@
 novice			boolean	(default off)		*'novice'*
 open			boolean	(default on)		*'open'*
 optimize (op)		boolean	(default off)		*'optimize'* *'op'*
-prompt			boolean	(default on)		*'prompt'*
 redraw			boolean	(default off)		*'redraw'*
 slowopen (slow)		boolean	(default off)		*'slowopen'* *'slow'*
 sourceany		boolean	(default off)		*'sourceany'*
@@ -886,16 +896,14 @@
 
 In 2005 the POSIX test suite was run to check the compatiblity of Vim.  Most
 of the test was executed properly.  There are the few things where Vim
-is not POSIX compliant.
+is not POSIX compliant, even when run in Vi compatibility mode.
 
 Set the $VIM_POSIX environment variable to have 'cpoptions' include the POSIX
 flags when Vim starts up.  This makes Vim run as POSIX as it can.  That's
-different from being Vi compatible.
+a bit different from being Vi compatible.
 
 This is where Vim does not behave as POSIX specifies and why:
 
-	The -w{number} and -w {number} command line arguments are not
-	supported by Vim.
 							*posix-screen-size*
 	The $COLUMNS and $LINES environment variables are ignored by Vim if
 	the size can be obtained from the terminal in a more reliable way.
@@ -909,5 +917,31 @@
 	The "D", "o" and "O" commands accept a count.  Also when repeated.
 	Add the '#' flag to 'cpoptions' if you want to ignore the count.
 
+	The ":cd" command fails if the current buffer is modified when the '.'
+	flag is present in 'cpoptions'.
+
+	There is no ATTENTION message, the "A" flag is added to 'shortmess'.
+
+These are remarks about running the POSIX test suite:
+- vi test 33 sometimes fails for unknown reasons
+- vi test 250 fails; behavior will be changed in a new revision
+    http://www.opengroup.org/austin/mailarchives/ag-review/msg01710.html
+- vi test 310 fails; exit code non-zero when any error occurred?
+- ex test 24 fails because test is wrong.  Changed between SUSv2 and SUSv3.
+- ex tests 47, 48, 49, 72, 73 fail because .exrc file isn't read in silent
+  mode and $EXINIT isn't used.
+- ex tests 76, 78 fail because echo is used instead of printf. (fixed)
+    Also: problem with \s not changed to space.
+- ex test 355 fails because 'window' isn't used for "30z".
+- ex test 368 fails because shell command isn't echoed in silent mode.
+- ex test 394 fails because "=" command output isn't visible in silent mode.
+- ex test 411 fails because test file is wrong, contains stray ':'.
+- ex test 475 and 476 fail because reprint output isn't visible in silent mode.
+- ex test 480 and 481 fail because the tags file has spaces instead of a tab.
+- ex test 502 fails because .exrc isn't read in silent mode.
+- ex test 509 fails because .exrc isn't read in silent mode. and exit code is
+  1 instead of 2.
+- ex test 534 fails because .exrc isn't read in silent mode.
+
 
  vim:tw=78:ts=8:ft=help:norl: