"bad pool header" bsod

[(^_^)]

When starting bfgminer or cgminer.  Guiminer seems to work fine, except my graphics card apparently won't even do one megahash now...

Came to check on my computer and bfgminer had crashed.  Tried to restart it and would get the bsod.  Even without my block erupters plugged in.

Updated drivers, running virus scans, and a chkdsk is scheduled for next restart.

Any other suggestions?