I just upgraded to Firefox 5. On the firefox home page I used to type a search and hit enter and it would bring back google search results. Now suddenly it keeps giving me BT Yahoo results. The search engine in the bar on the top right still says google, and if I do a search using this I still get google results no problem. But if I type in the search on the Firefox home page I get yahoo.

I have a bt yahoo web mail account but have never had this problem before. Can anyone help me get my google search results back? Thanks.