I'm having this issue as well.
I'm noticing the version mismatch (libcompizconfig0 is 0.7.4-2, and compiz/compiz-core/compiz-gnome is 0.6.3-git20080115). I have compiz working again by removing the libcompizconfig0 package. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]