Glad to hear it worked for you!
It increadibly frustrating to have crash after crash and not be able to lock down the cause. It took me over 4 rebuilds to figure it out, by which time I was "almost" ready to go back to windows.
My Ubuntu is now 100% stable and rocks along with Quake4 at a right old lick.
Perhaps they will sort this out soon, so I can turn Irqbalancer on again.
Just for the forum search engine, other side effects of this bug are:
1) Jumpy crazy mouse & keyboard input after periods of low cpu activity, only solved by a reboot. (only USB keyb/mouse are affected)
2) HDD crashed "sense data lost" errors for sata drives, requiring a reboot (as the cpu has lost the irq for the drive).
3) Hardlocks when running intensive 3D programs.
Hope this helps anyone who searches for these things.....