I got same problem, everything worked fine, but few minutes before important race I got problems desribed by blkcliostu

I have Saitek R440 wheel...

I solved problem by restaring computer and very quick check by Spybot, Ad-aware, CCleaner and Registry compressor... and the problems disappeared...

i have R9550 @ 502/605MHZ, flashed to 9600xt, MSI K7N2 Delta, CPU AThlonXP 2400+ @ 2310Mhz and i did'n notice any change between 5.11, 5.12,5.13 drivers... all fine