Comment 38 for bug 219385

I've been doing my best to read the patch since I take particular interest in the native theming portion, but from what I can gather, doesn't GTK3's use of Cairo for drawing widgets mean we can bypass XlibNativeRenderer (and all it's ugly slowness) completely?

I may have missed this, but I don't see you setting the enable-system-cairo configure flag by default when GTK3 is built, which can cause nastiness.