New kernel after update set off bug notification. Doesn't seem to affect anything but locks up on shutdown.
BUG: key f53bdb84 not in .data!
microcode: CPU1: patch_level=0x1000086
platform microcode: firmware: requesting amd-ucode/microcode_amd.bin
BUG: key f53bdb84 not in .data!
microcode: CPU2: patch_level=0x1000086
platform microcode: firmware: requesting amd-ucode/microcode_amd.bin
BUG: key f53bdb84 not in .data!
microcode: CPU3: patch_level=0x1000086
platform microcode: firmware: requesting amd-ucode/microcode_amd.bin
BUG: key f53bdb84 not in .data!
microcode: Microcode Update Driver: v2.00 <tigran@aivazian.fsnet.co.uk>, Peter Oruba
Report sent.
Kernel 2.6.34-0.16.rc2.git0.fc14.i686 Fixed the problem.