PHP 5.1.0, Categories, and Commenting

I gave PHP v5.1rc1 a try yesterday, my WordPress blogs didn’t like it all that much. My category links weren’t working and no comments could be made because I was somehow exceeding the time limit (Not so fast, cowboy.)

I’m sure there may have been other problems, however I had to switch back as the server my blog runs on runs others, as well.

Anyone else have this problem or any luck with the new PHP?