What is Mystart

When I signed back in to Safari, my home page was changed to Mystart (what ever that is). I didn't download anything It just showed up. Does anyone know anything about this and how to remove it safely. I assume it is some kind of malware or something. I use both Safari and Firefox and Firefox is fine. Only Safari was changed. I am using Snow Leopard on my desktop.

Any Ideas?

Thanks

brentfromu