Ok, I know its not a virus but it is really weird. Whenever I open safari it takes me to my homepage just like normal. I can go to any website except for macrumers. The only way I can get to macrumers is if I type in www.macrumors.com, if I just type macrumors or macrumors.com like I normally do this will pop up and close down safari. This only happens when I type in macrumors.