zoo@aspire-3610:~$ killall compiz
compiz: no process killed
zoo@aspire-3610:~$ metacity --replace
Window manager warning: last_user_time (3080107056) is greater than comparison timestamp (1926476066).  This most likely represents a buggy client sending inaccurate timestamps in messages such as _NET_ACTIVE_WINDOW.  Trying to work around...
Window manager warning: 0x2c00025 (Firestarte) appears to be one of the offending windows with a timestamp of 3080107056.  Working around...