Same bug for me!
My system: actual Gutsy (i386), Dell Inspiron 6400 with nvidia GeForce Go 7300 and nvidia-glx-new driver.
With enabled compiz, X crashes and GDM restarts when I open 3-D-apps like glxgears or 3-d games like second life.
No problems when I disabled desktop-effects!
Never had this bug with Feisty and compiz from Trevinos repos.
Same bug for me!
My system: actual Gutsy (i386), Dell Inspiron 6400 with nvidia GeForce Go 7300 and nvidia-glx-new driver.
With enabled compiz, X crashes and GDM restarts when I open 3-D-apps like glxgears or 3-d games like second life.
No problems when I disabled desktop-effects!
Never had this bug with Feisty and compiz from Trevinos repos.