Here's an interesting glitch for you all...
If you have your Firefox quick search bar set to Google and you use Cool Preview (one of the recommended add-on's by Tom's), then you will get the Pac-Man sounds EVERYWHERE!!! Yup... pretty cool Google, you made many users think they had gotten a virus and many more think Cool Preview sucks.
Fixes I have read about after uninstalling Cool Preview are: disable autoplay in flash, remove shockwave/flash, disable Cool Preview until Pac-Man is gone, don't use Firefox for a bit, and finally make sure you don't have Google set as your default search or homepage and don't go there until pac-man is removed.
Just a FYI for those who are curious about the flaws in Google's wonderful idea/Cool Preview add-on.