I've experienced the same problem when copying/cutting and pasting between GoGlobal CDE/xterms and Windows XP apps. The operation works initially and then, some time later, stops working as if some buffer has been filled. Incidentally, I've seen similar behaviour when pasting between XP Remote Desktops so it may not be a Go Global problem.

WORKAROUND:
Launch the Windows clipboard (clipbrd.exe) and delete the contents. The cut and paste will work again.