> I think the problem is at gnustep-back, in the way how gnustep interact with each window managers.
German,
Thanks for the information. I have checked the code in gnustep-back-0.22.0 and found this in an x11 header file called XGGeneric.h (written 12 yr. ago)
I don't see Compiz listed, so if it's using these flags more than likely it is the XGWM_UNKNOWN flag. There is also an 'Offsets' structure in this header. Is there a way to find out who is calling this header?