2.6.30 is required for AVX on SNB!

[izard]

Lost almost 2 hours today before I recalled that AVX state saving was implemented only in 2.6.30. So if you are running some AVX code on SNB on any mainstream distro, you'll get very bizarre errors until you upgrade the kernel!
P.S. I dont' remember which SPs are required for Windows, but I am quite certain one needs some service pack to run AVX code on Win as well...