In the current IE9 beta, when using the IE9 standards document mode (set with the F12 developer tools), text replacement/insertion does not work correctly. In the wikitext at http://en.wikipedia.org/w/index.php?title=User:Mr.Z-man.sock/test&oldid=408465859 attempting to link the last word with the link dialog produces:
"... deserunt mollit anim id es[[laborum]]um."
The correct result is:
"... deserunt mollit anim id est [[laborum]]."
The problem seems to be related to the number of line breaks that occur before the text selection. On http://en.wikipedia.org/w/index.php?title=User:Mr.Z-man.sock/test&oldid=408466339 (with more line breaks), the same attempt produces:
"... deserunt mollit anim[[laborum]] laborum."
A similar result is seen when trying to insert text. When inserting a link to [[Foo]] after the last word, before the period, the result is:
"... deserunt mollit anim id est [[Foo]]laborum ."
Version: unspecified
Severity: normal