Thunderbird wrote: > Make sure you use XQuartz, the default X11 is not that good. It has some nice opengl bugs. I know that they are fixed in a new version but I'm not sure if that version is also available for 10.4. you best bet is to install Macports and Xcode... and let Macports do a full build of the latest Xquartz ("sudo port install xorg" will do it once Macports is running right). This will give you an X11.app in /Applications/Macports that is TONS better than the built in 10.4 one. The built in 10.4 apple one is built on a pretty old Xfree86 build... its really not very good.