--- a/runtime/doc/various.txt
+++ b/runtime/doc/various.txt
@@ -1,4 +1,4 @@
-*various.txt*   For Vim version 7.0aa.  Last change: 2006 Mar 05
+*various.txt*   For Vim version 7.0aa.  Last change: 2006 Mar 17
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -66,7 +66,24 @@ g8			Print the hex values of the bytes u
 			value of 'maxcombine' doesn't matter.
 			Example of a character with two composing characters:
 				e0 b8 81 + e0 b8 b9 + e0 b9 89 ~
-			{not in Vi}
+			{not in Vi} {only when compiled with the |+multi_byte|
+			feature}
+
+							*8g8*
+8g8			Find an illegal UTF-8 byte sequence at or after the
+			cursor.  This works in two situations:
+			1. when 'encoding' is any 8-bit encoding
+			2. when 'encoding' is "utf-8" and 'fileencoding' is
+			   any 8-bit encoding
+			Thus it can be used when editing a file that was
+			supposed to be UTF-8 but was read as if it is an 8-bit
+			encoding because it contains illegal bytes.
+			Does not wrap around the end of the file.
+			Note that when the cursor is on an illegal byte or the
+			cursor is halfway a multi-byte character the command
+			won't move the cursor.
+			{not in Vi} {only when compiled with the |+multi_byte|
+			feature}
 
 							*:p* *:pr* *:print*
 :[range]p[rint] [flags]