Severe display corruption and X process runaway with proprietary drivers

Hello,

Yesterday, I left my office for a few errands, and i returned to find my display had locked up and I couldn’t reset it without logging in via ssh. Ever since, when I start x the background is severely corrupted and the system hangs with a single-core runaway for a thread on X.

Drivers tried
313.18
313.09

Kernels Tried:
3.8.0-rc4
3.7.3

Open-Source drivers work as expected, whilh i think rules out any hardware failure…

I still have not come to a solution. Any ideas?