100’s of proccess of index.php crashes server

I just had my account suspended because my wordpress 2.9.1 had multiple (1000’s) instances of the index.php running at the same time.

I’m using Arvixe for hosting and they are supposedly a wordpress host… so not really sure where to even look. It didn’t happen until after I upgraded to 2.9.1

I was wondering if anyone else is having issues with either 2.9.1 or Arvixe.

Thanks