Mysterious reset passwords

Hi. This is my first post. I've read alot about rooting on here and other forums. And I decided to root my Droid with easyroot. Its been 5 days since I clicked root me and I haven't done much except for install setcpu and overclock to 800mhz using the stock kernel. My phone had been behaving normal up to today. When I woke up I saw a notification from visualvoicemail telling me my pin was changed. But my old pin was still the same. Then I went on the YouTube app and my pass on there is also lost. My concern is because I didn't change the pin or password. It happened overnight. Should I be worried about a security breach and is there anything I can do to track down the cause of it?