|Seems odd. I guess you could see if the themes or sounds for actions have any effect.|
I guess it could be that the usb is not really in a safe to remove. The issue with that is a virus usually.
Put a folder (folder) on it called autorun.inf and see if it lets you. Matter of fact, put that folder name on every usb device.
Text, talk, drive...CRASH.
Hang up and drive @#$%^^