Damn I've been stuck on PR 5 forever now. I can't ever get to PR 6!

*edit*

I just checked. I have over 5,600+ backlinks for my blog, and still, the predictor says I will only be at 4.8 (rounds up to 5), with 80+% accuracy.

Boo! I'm guessing you gotta hit the 6,000 or 6,500 milestone. Jesus!