Dear Experts! My Website is PR1 and many of my website's post and pages were also PR1 and PR2, but today when I was checking my website's pages, all of them were degraded to PR0. Homepage is still PR1 but rest are PR0. Any idea, what happened to them? Is it result of the latest google update or what? Waiting for your favorable replies.. Thanks ya
Checked some of my websites and nothing happened, it may be a minor update, you may have got penalized for using any techniques that are outside the webmaster tools guidelines.
All I did was I deleted and re-submitted my sitemap because there was some issue with indexing of some pages.
Google doesn't update all website at once. It simply check website by website. When it sees some low quality content it degrades its rank. Check whether you have any issues through webmaster tools. Also avoid duplicate contents.
I think you are recently affected with PR update, That's why your ranking will fall down. Keep doing an off-page optimization techniques.