Oh anyway, if you want to play with the OS X port of GTK+ on your Intel Mac, you want to have this Cairo patch: https://bugs.freedesktop.org/show_bug.cgi?id=8939 From what I've been told Cairo might switch to another Quartz backend soon. From reading the code it looks like that one suffers from the same issue but I haven't been able to test for myself since the new backend seems to be far from compiling on my machine …