Mouse stopped movinng

As I was using my mouse. the cursor stopped moving. The right button worked. The left did not. I could not tell if the wheel worked. The keyboard still functioned. I had to reboot and the mouse works fine now.

Kernel Linux 3.6.6-1.fc17.x86_64
Intel Core 2 Extreme CPU X9650 @3.00 ghz
8 Gb memory
Microsoft intellimouse Optical