is there a known issue with MD in the 3.6.6 kernel, where it keeps breaking software raids?

Greetings Neil and rest of raid-world

I am noticing a pattern with 3.6.6 whereby software RAIDs (RAID10,
RAID10, and RAID6) "fail" after a reboot, and we have to force both correct RAID assembly, and let the drives finish rebuilding.

I am not sure if this is a kernel issue, an MD issue, or something
else. It is happening across several different HBAs (LSI and Intel) on the same unit. We could try updating to 3.6.8. Is there a known issue with RAID shutdown or device shutdown in that kernel that does this? The 3.2.x series didn't do this. Nor did the 3.5.x series.

Thanks!

Joe