Over the weekend, I have seen tons and tons of threads in several forums with webmasters and SEOs complaining that their PageRank score in the Google Toolbar took a dive.
I will just list two threads, because I cannot list all of them. There is a thread at DigitalPoint Forums and Google Webmaster Help.
The thing is, I didn't see anyone happy with the new PageRank score they received. If you look closely at the Google Webmaster Help you will see, Googler, JohnMu say:
Looking at your site, it might have been that there was some kind of glitch that occurred just as the latest round of Toolbar PageRank was put together. In a case like that, you just need to wait for the next update (we do 3-4 updates per year). That said, this is generally not something that will affect your site's crawling, indexing or ranking, so I wouldn't worry about it! Don't worry about PageRank :-).
So, with this guys particular site, there was an issue exporting his site's PageRank to the Toolbar, during Google's quarterly export. There may have been other issues with other pages impacted by this export.
I don't know for sure, but what I do know is that we should not worry about Toolbar PageRank.
Forum discussion at DigitalPoint Forums and Google Webmaster Help.

Comments:
No Name
04/01/2009 09:37 pm
My pagerank has rise this afternoon from 0 to 1... A great rise :(
No Name
04/02/2009 05:39 am
My PR has been at 2 ever since New Year's Day. I was hoping to see it rise to 3or 4.
Neetu Sharma
04/02/2009 09:51 am
Hey, Now after 3 months from 31st Dec 08, Google finally update my site’s Pr as on 2nd April 09. @@ http://www.seowonders.com
No Name
04/03/2009 01:57 am
Our PR did fail to register in the Google toolbar about a week ago but as of today our PR did go up on 3 websites.
Scott
04/05/2009 05:06 pm
I had a page rank of "4." A week ago I switched my sitemap due to low traffic- signed up with www.AutomaticSiteMap.com. Now my page rank is "0". I will switch my sitemap back. I just wanted to warn everyone.
Ryan Meray
04/06/2009 04:30 pm
My site went down from 4 to 3. On the plus side, we had a lot of new content that went up after the last update, so a bunch of previously unranked pages at least have a ranking now. Still really bummed about the dip.
No Name
04/18/2009 11:26 pm
All sites often show no rank lately in FF for me including google.com. Pretty strange, has not happened in the past.
scott
05/14/2009 05:05 am
> I didn't see anyone happy with the new PageRank score they received Some PageRanks went up, some went down. Looking at the data it was not predominately a positive or negative change in PR. You can see some sample histories of PR here: http://www.rankinghistory.com/
No Name
05/14/2009 02:43 pm
I have 23 Websites nothing change with Pagerang but the Positons went down!
No Name
05/17/2009 05:10 pm
My website is still same . . . . . .. PR=0 :-(
julian
05/20/2009 12:21 pm
i hope my rank rise up nex
Rob Abdul
05/20/2009 01:24 pm
My homepage still at PR2, but a deeper page in my blog has a PR3. Traffic has increased by a factor of 10, mostly form Google in the last 12 months. Content is King!
michael
06/24/2009 10:13 am
no word yet on any update for june, I will keep you all posted and let you know if anything changes.
Laffen
07/25/2009 02:45 am
Dont forget that pagerank is how the googlebot experience your website in terms of quality. You got to play around with the googlebot and make updates often so that your online value of content is interesting to the www audience. Updating and redesigning your site often is the best way to score pagerank points. Pagerank is not named after Lawrence page if you think that. Its a ranking system like the army use e.g a pagerank 10 is a top officer a pagerank 0 is the value of a foot soldier. Build your site like a organization. Apply organization theory and use that active in your sites structure with main sites and undersites. Remember to use logics. Good luck
Christopher Roberts
08/18/2009 09:01 am
My rank went down :(
Carol
08/19/2009 04:25 am
My PR is still same:-(, I don't know what is google doing....
Raj
08/19/2009 12:28 pm
hey my blog pr is down 4 to 0. i have 3 blogs having 4,4 and 3 pr respectively. what is google doing? benchod google
Neetu Sharma
09/22/2009 04:00 am
When is the next update?
Mike
10/06/2009 01:20 pm
Next PR update is expected to be in second week of October.....
No Name
11/07/2009 07:56 pm
six month back I bought two sites , I never build any linkbuilding and seo services, luckily I got PR 1 when I registered a sites, may be that is already used by some one, but now its droped to PR0, my another site is related music niche , I 've posted nearly 10 posts only, but this site PR is suddenly increased from PR0 to PR3 , I really happy with this one, I think google used some different algorithm while calculating PR..
asmrk
04/25/2010 06:05 pm
Google never shows you your live true pagerank in the toolbar.
asmrk
04/25/2010 06:05 pm
Google never shows you your live true pagerank in the toolbar.
No Name
05/10/2010 02:06 pm
I thing, google update page rank the next month
No Name
05/28/2010 09:18 am
may in the end of June 2010 Google update page rank
No Name
08/04/2010 09:00 am
Google page rank update every 3 moths