A domain I registered a year ago had a temporary page while I built up the site, and therefore also PR 0. I released the site officially about 4 months ago, and for about 2 months ago I think, I jumped up from PR 0 to PR 5 in one jump.
So far, so good. But the last weeks I've seen a strange behavior. I use to check my domain's PR with something called "Future PageRank" (a known place on the net). It shows me how much PR a domain has on almost 20 of Googles different DataCenters, included the Google Toolbar.
Suddenly 2 of these DataCenters show me PR 0 for my domain. I fear that this is the start of something "bad", and that soon all the DataCenters will show PR 0, but next day they all show me PR 5 again. This has happened several times now. Yesterday it happened again, when 3 of the DataCenters (incl. the Google Toolbar) showed PR 0, but today all shows PR 5.
Could this mean that some of the DataCenters really are devaluating my PR, but are corrected later by the other DataCenters, or might it simply be that some of the DataCenters are down (not working) some of the days?