fair enough. anyone actually playing with it? its just when i play with 800dpi and without drivers it feels A LOT different than playing with 800dpi and driver.
it might be just me, but I've been playing for years with a mx518 on a 65 cm/360 setup @125 hz WITH setpoint, and I've never had any sort of negative acceleration, nor any problems.
Curiously enough, when I switched it to 500 hz, it started skipping all over, but I never thought about correlating the issue to the drivers, I just assumed it was the hz switch.
Maybe beacause you have the first gen of the MX518? (1600 cpi max, non-G5 glides)
The gliched driver is only for the Mx518 v2 (1800 cpi max, G5's feets).