Comment 1 for bug 1264719

On OS X 10.7.5, with local inkscape builds r12862 (GTK+/X11, GTK+/Quartz) outside of MacPorts; dependencies installed via MacPorts (all MacPorts ports built from source):
- reproduced with built-in GTK+ theme
- not reproduced if running the same builds with (GNOME default) Adwaita theme

Steps to reproduce:
0) configure GTK3 to not use any theme (-> GTK3 apps will use built-in fallback theme)
1) launch GTK3 inkscape build with default prefs
2) draw a rectangle, keep it selected
3) open 'Fill and Stroke' dialog
--> same pixman errors logged to console (multiple times).