Re: beta driver (260.19.04) bug report
I got the same problem and had to revert to 256.53. The laptop is Sony Vaio VPCF127FX, Geforce GT 330M, Arch Linux 64-bit with custom kernel.
Only SysRq+B works (Sync, Unmount, etc. does not since I notice after these combinations the system still checks for error at boot up).