I get this when I try to load the CVS tab under Preferences: Plug-in org.eclipse.team.cvs.ui was unable to load class org.eclipse.team.internal.ccvs.ui.CVSProjectPropertiesPage. I also get an error when I try to do a CVS update on Projects that were set up to use CVS in previous versions.
Can you test this with the latest package (3.2.1-4) or post your workspace/.metadata/.log file? I think that bug #202081 was that cause of this error but I'd like to confirm this before I close it.
Seems to be working fine now.