In case any users haven't had the email notification, there's a critical security update out for WinZip 10 (first time I've ever heard of such a thing since I adopted it when it was first launched way back...).
Get it here:
http://www.winzip.com/dnldwz.cgi?ENRRWZC
Note that there is also a new version out, oddly enough WinZip 11, which has the fix implemented.