i copied information from a mail message in Outlook, in XP pro, and tried to paste it into Word on the OS X side, but it didn't work. It DID paste into Excel on the OS X side, at which point, I just re-copied it and pasted it into Word on the OS X side.
I have the same issue - pasting into Excel works, pasting into Word doesn't. Pasting into iWork programs with no problem.