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Has some strange black flickering (screenie http://i.imgur.com/dUOSudN.png).

I'm a webgl developer and WebGL works perfectly fine otherwise (no crappy driver, no crappy GPU etc.)

Browsers: Firefox 26/27 and Chrome 32/33 (error visibile in all)

OS: Linux Ubuntu 13.04

GPU: GTX-780

Driver: nvidia 331.20

To add another datapoint: It works fine here.

Browser: Iceweasel-libre 27.0.1

OS: Parabola GNU/Linux-libre (i686)

GPU: Integrated Intel (specifically, device code 14c0:005a)

Driver: 'i915' module

I sort of suspect that it is a "crappy driver" that works fine in all common cases, but has a bug in a seldom used feature.

Same in Chrome 34, Ubuntu 13.10, GTX Titan, NVIDIA 331.49.