Please rev. bump. Reproducible: Always
Some maintainers do not appreciate zero-day bump requests. https://wiki.gentoo.org/wiki/Bugzilla_HOWTO#Zero-day_bump_requests
I've tested 331.38 and x11-base/xorg-server-1.15.0 it seems to be working correctly. (I'm also using kernel 3.13-rc* which small nvidia-drivers patch from https://devtalk.nvidia.com/default/topic/644906/linux/331-20-on-3-13-rc1-kernel/1) With 331.20 it wasn't even starting xorg-server (segfaulting with -ignoreABI), so I had to use older 319.76, which on the other hand doesn't work correctly with newer chromium +tcmalloc (#413637). So even as zero-day request, this one is quite useful to have.