irock, I wouldnt worry about it too much. The toolbar is only there to represent PR in a nice package sort of way, and obviously your site cannot be both PR4 and PR0. No doubt someone else has experienced this though, and may offer their version of events :)
I would wait a little longer, sometimes the Toolbar just has trouble getting through for a while and the cache page fow www.yourdomain.com seems inconsistent.
At the moment, it seems that your home page was a "...no longer in operation..." message when Googlebot came to visit www.yourdomain.com, but was your proper contents page when Googlebot visited yourdomain.com
As these were very different pages, Google rightly listed them separately, with separate PageRank.