My last penalization was in october 2010.
I made big changes in my site, like removing lots of links to affiliate, delete duplicate content, increase content, delete thin pages. In december 2010 my site was again Top, but was hit a bit by some Pandas, but deleting more thin content and increasing content at the end of august I reach the best positins
Yesterday nighy (11/6) again my site was penalized, most of the kw loose 45 - 70 positions.
Watching GWT I see that one site that links to me, now have 13000 links from the footer to my site. Seems that the owner of that site made a mistake and now send me massive links. Could this be an issue?
Any ideas ?