Fixed it.
Went into the logitech setpoint software, went to game settings, enabled game detecttion, set speed and accleration to be ajusted by setpoint rather than the OS, and then unclicked "keep mouse acceleration".

Sorted. Thanks for the help guys

Hi, I have the exact same problem!
I have a really great quality mouse, and I play lots of other games with no problems.

Did you fix this problem? If so how?

Thanks.