For anyone having problems with titlebars not showing up with Compiz enabled, using ATI here is the fix:
http://wiki.compiz-fusion.org/Hardware/ATI

If you are using the last method because this is your card, and it doesn't work, change "ati" to "radeon" and then restart X. This should solve your issues with totally blank titlebars on applications such as on firefox, or gedit. Hope this helps someone