[arch-general] KDE breakage with glibc 2.19-2

Is anyone else seeing breakage of KDE compositing with glibc 2.19-2? Large areas are unrendered: window contents and the plasma desktop are black, although my panel is visible. Seems OK when I turn of compositing. I've tried going back and forth, and it's definitely the glibc update that's causing the issue for me. Anyone else? Paul