Comment 4 for bug 730038

Hmm, not sure I completely understand your previous message but I get the impression from it that the external screen works right with classic desktop (no effects), so it sounds like this is a dupe of the bugs relating to compiz' handling of multi-monitor configurations. I'll bump it over there.

If you can reproduce multihead problems when using just metacity, then that may suggest an actual X issue in which case you can set it back to X.