There is indeed a quick ficfix to it. But it is not a permanent fix. If you are using Windows 7 hit windows key + r this will open up a window where you can start a program, type main.cpl this will open a window where you can change options for a lot of things. What is of interest to us is the mouse of course so go to pointer options. Ok once here you want to check "Display pointer trails" and i usually put the slider to short cause this thing pisses me off. With the slider at short you wont even see the trail
So you can play without having pointer issue in starcraft 2 :P