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DVDBurning - 1:28 pm on Jun 24, 2004 (gmt 0)
While this is possible, I think it is extremely unlikely. If a page was formerly in the Google index with a PR of 1 or greater, and now it has a PR 0, it is almost certainly a penalty of some sort. I thought that a page automatically started with a PR of 1. If a page is part of a large site, it would inherit some PR from other pages in the site. Also, a site that has been around for many months is likely to have picked up a few legitimate backlinks. Do a search for the sitename in quotes, and you might find a few that don't show up with the link: search. Google has been handing out a lot of PR0's lately, although the PR0 wasn't showing until this PR/backlink update. If a site was formerly showing up in the SERPs, and then it disappeared a few weeks ago, it shouldn't be a surprise to see a PR0 on these pages. This is a pretty clear indication of a penalty. The filter of the month seems to be crosslinking among sites on a common IP address, or from a common owner. Of course, there are plenty of other possible reasons to get time in the Google penalty box. Just check through the WW threads here...
Trillianjedi,
You said "PR0 can be a result of having no inbound links (or no inbound PR transferred). So if all your links were purchased, and the hosts of the links got PR0'd, you'd hit PR0 anyway, although no penalty has actually been implemented. "