I think the complaint is that the cursor gets larger. I saw some posts on this on the forums at http://game.amd.com and from my understanding (and unfortunately, personal experience), there are issues with ATI's 5*** series cards and driver sets. Another issue in the same series of cards are "Grey Screen" issues - system halts, screen is grey/blue/green - may or may not be recoverable. No Blue screen crash, so no hex codes in the .dmp, either.
ATI are aware of the issues, and are supposed to be working on the fix(es). Supposedly it was fixed in 10.2, but I can attest that it is not.
<cries over having to use the 4870x2 from his old build in the new comp instead of the 5870 he bought>