I have imagegator.com that sometimes show as PR4 and sometimes PR0. Why is that? I just checked # Domain name Current Pagerank Predicted Pagerank 01 www.imagegator.com 4 5 (Check) but later on it will show as PR0
are you always putting the "www" in front of it. Also google has been rolling back PR of sites. These rollbacks seems to go back to normal after a few days.
Well the datacenters are constantly moving back and forth between old and new data. I bet your PR before the last update was zero.
Yep, I'm in the same boat. Mine goes between 4 and 0 too all the time. PR is useless (well, toolbar PR is), I'd not spend time worrying about it.