Till last 2 days back my 3 yr old blog was well indexed by Big G. But now Suddenly my whole blog has been deindexed.They have not intimated any reason what so ever. Surprisingly in google webmaster tools every thing is ok and shown my blog has been indexed to over 500 urls.Also I can see indexed pages of my blog in a proxy site. Why so? Any body know?
one of my ebook sharing blogspot domain deindexed which has lot of rapidshare links . so if u making any such sites then it can happen.
I had a similar problem with one blog I run. It made me reconsider how I applied categories and tags. What i believed what was happening that I was using pretty much the same tags and categories for most og my posts, so basically "duplicates" of the index page were being produced, thus Google was seeing it a irrelevant content (so I guess).
You may want to check this out. http://www.selaplana.com/2009/07/30/why-does-google-deindexed-some-webpages-of-my-blog/