moused linear acceleration drops

Hello,

3 months ago moused was extended by a _very_ nice feature: Dynamic 
acceleration. It works really fine.
But the linear ac(de)celeration seems to 'drop' moving information.
I have a 1600dpi mouse which is far to quick by default.
When I use 'xset m 1/3' the speed is fine and also every smallest movement 
gets recognized.
When I use '-a 0.33' with moused (besides -A 1.6/2 with xset m 1) small (and 
slow) movement's are not reported. I have to move at some minimal speed to 
get the cursor moving.
So it seems that info gets droped.

Could someone help me fix the decelleration for moused?

Thanks in advance,

-Harry