Hi friends, this is my website: http://www.video-to-flash.com. I sell softwares mostly used by web masters. But about 3 weeks ago, my site's PR goes to 0, but now as you see PR comes back. Some one can tell me what happens? Or what should I do to prevent it.
PR goes to 0
Usually it happen when Google still updating their PR algorithm. Just keep provide quality links and content and you'll be fine.
Yes, that's just a moment while Google updating after that it will presents the real PR.
This effect always happen to my sites as well.
This effect always happen to my sites as well.
Hi thank you friends. So it seems it is only google's problem. 
Yes I too think so. My PR3 site become PR0 and back to 3 after few days.

This happens when there is a Google page rank update is going on. It goes up and down then settle on the real page new rank you get.
Your PR comes back? but what i see is that your website is now "N/A", even worse than 0, did you do anything blackhat to get your backlinks? cos' it is not normal that you got about 18k backlinks, indexed by google, got backlinks from yahoo directory but still got page rank "N/A"....unless google detect something from you website that is "unhealthy"...
This is something unusual thing happened. I'm still with PR 1.
my pr is always 0 ,all because it is new
,I have a long road to go 
don't worry about the PR... worry about the traffic you will be receiving from google...
I have PR1 sites that get more traffic from google than my PR3 sites...
I have PR1 sites that get more traffic from google than my PR3 sites...
PR is not so important because it is just the constraint of Google. I think traffic & visibility of website is more important.
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