The code tags have changed in two ways:
1) UBBCode, Graemlins, and HTML are no longer interpreted within them
2) IE uses a slightly larger font now

#2 is probably the cause of the additional table distortion.

I would advise your users to use the quote tag instead of the code tag unless it's real code that they're posting. (The quote tag wraps text, while the code tag does not.)

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Charles Capps
Programmer, Infopop Corporation
Please do not contact me privately for support - post on the board or open a support ticket instead!