Ah, and now I see why. The gconf-defaults file shipped by metacity-common spells the control key <Ctrl>, when it should be <Control>, and somehow compiz ends up omitting it and processing the rest of the string as just <Alt>T
Ah, and now I see why. The gconf-defaults file shipped by metacity-common spells the control key <Ctrl>, when it should be <Control>, and somehow compiz ends up omitting it and processing the rest of the string as just <Alt>T