Can't save draft – blog freezes

This is a problem that started last week. When I try to “save draft,” my blog freezes. AND, it freezes my internet. The only resolution is to restart my computer but that only helps the internet issue, not with saving the blog.

I just updated to 3.3 so it is not that. I have tried three different browsers and all have the same problem. I have tried with firefox with all add ons disabled and that doesn’t help. I have tried to save on a different computer and have the same problem. My host says it is not anything on their end.

Please help! I’m at the point where I basically can’t blog!