My site has been going up and down since january supplemental pages crisis, but know I noticed a very different situation... from Google Webmasters Tools I keep getting 404 errors from pages that are actually available. Most of my site is now out of Google, after getting a one 404 full strike... I truly donīt know what to do. I am tire of getting new problems, and this is no game for me. Please, I would really appreciate some advice and similar experiences (if there is any).