Steps to reproduce:
1. isntall cairo 1.4.2
2. compile gtk+2.0 with quartz target

Stack trace:


Other information:
gdk/quartz/gdkdrawable-quartz.c 

line 64:
  surface = cairo_quartz_surface_create (context, width, height, TRUE);

and cairo-quartz.h from cairo 1.4.2:

cairo_quartz_surface_create (cairo_format_t format,
                             unsigned int width,
                             unsigned int height);