this morning i looked at my site, it has a PR 7 overnight. just now, i checked, it's still 7! i'm pretty sure it can be no larger than 2.
Pr is all funged up right now. check future page rank at seochat.com to see what data centers are messing you up. I am seeing 3 centers, including the toolbar, that list pre jagger PR for me.
Saw mine jumping from 0 to 8. Can you imagine my surprise? It went back to 0 after a couple of hours again though.