This has been happening to me recently - I run two monitors from a the above mentioned card, but it would seem whenever I play a full-screen game (notably DotA 2 and League of Legends) I get a visual Cursor bug.
It only happens in the monitor that the game is running in. It carries through the game to my desktop, too, and into every other application on the same monitor.
You can't screen shot a cursor (ffs), so here are the best pictures I could take. Initially it will look something that I can vaguely describe as a sawblade and then slowly deteriorate, usually when Alt+tabbing and switching between windows.
I've read a bit about this, but haven't found any solid answers. It might be a drivers glitch, have no idea.
If you need any more information about my specs, drivers etc.. I will be glad to go get it, as long as there are basic instructions on how to find it as I'm not a computer genius - I can get around without too much difficulty though.