Session match IP or User Agent in IE 9 kills!

[eluser]RJ[/eluser]
I have it at 255; I've overridden the session Lib with a modified version adding and comparing at 255 instead of 50 ( the only two changes ). Interestingly I found 9 reports a string less than 128 when users hit the site but after they've logged in (using fb connect) the user agent explodes in size with a bunch of .Net junk added. This obviously kills the user agent comparison.

Did they modifiy the session lib in the latest reactor? I just upgraded last week.

Stripping at X char makes sense when the agent is appended for whatever reason but what X should be I don't know. This is just a theory.