I get redirected to other search engine sites periodically. It's one of those things I just assumed was a hiccup. After a while though I decided to run a full system sweep for spyware/adware/malware and all that jazz. Tinkered for a while and the problem went away. I didn't find out exactly what it was, but I'm assuming it's a few tracking cookies. Delete the cookies and what not from your browser, run an Adaware scan and a virus scan while in safe mode. Should be back to normal.