Mathias: I'm not sure, as I haven't poked at composite at all up to now. This seems to describe a possibly-related situation (though, I'm not sure why the status is still "New," given that it was reported against 7.1)
https://bugs.freedesktop.org/show_bug.cgi?id=8499 --xsdg -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]