I had increase in Google PR last Friday (September 26, 2008) from PR2 -> PR4 for my website www.thechessworld.com .
However, this Friday (October 3, 2008) the PR dropped back to 2.
I checked some site I knew the PRs of before and after this week and it is seems like the Google just rolled back the PR changes from last week.

Is it the same for your sites? Whats going on and when to expect another PR update. Or maybe it is a mistake??

Wow my friend you are dead correct. Using digpagerank.com you can see that some datacentres are showing PR2 and some are showing PR4. So something is going on at the big G. I tried a bunch of my sites and did not see the same issue.

The same thing is happening to other people according to some other forums.

I think there are technical problems in Google, their data centers are down:


Showing results for: http://www.thechessworld.com

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Data Server

Current Pagerank

1toolbarqueries.google.com
Datacenter down
2216.239.51.*
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3216.239.59.*
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464.233.161.*
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564.233.167.*
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What's going on is Google is updating toolbar PR. For most people concerned with SEO that should result in a big "yawn" since it's really not important what PR the toolbar shows for your pages. It's absolutely something you shouldn't spend a moment worrying about.

If you market your site well, your marketing going to include building links into your site and creating the kind of content people want to link to on their own. If more and more web pages link to one of your web pages, then the PR of your page is going to go up. Regardless of whether your PR goes up or not, it's still a good idea to be marketing your site and having more links pointing into your site. The actual number the toolbar shows as the PR of any page of your site is completely irrelevant to your ultimate success.

If you spend your time focusing on what PR the toolbar shows for your pages, you're missing the big picture. You're measuring success in terms of an arbitrary number.

Focus instead on things that matter.

Originally Posted by kasparovda

I think there are technical problems in Google, their data centers are down:

Nope, it just means that they have blocked that "tool" from accessing their servers.

My site also reverted back to its old PR

No its ok with my blog. My blog had PR 0 before this updation and now this one have PR 3. So everything is normal here.