Can't seem to hold calibration in B43. I have to recal every 5 or 6 minutes it seems. No problems like this in AH1, WB, FA, WW2O so there's likely something in AH2 doing it.
System:
AMD Athlon 1600x, ~1.4GHz
256MB RAM
MX440 (8xAGP), 64MB ram
Win98.
Edit: controller is plugged into the game port (dunno if this helps or not).