Anybody else having a problem with the volume settings? It can't be turned up or down and the volume bar will periodically pop up on the screen. Very strange.

As the title says, this is something that happens periodically but is very annoying when it happens. Sometimes, when changing the volume, it will stop responding to being turned up or down (Using the function key and volume keys on the keyboard), and the volume bar that shows how loud it is will just pop up on the bottom and flash for a bit. Weird. Does this happen to anybody else?