nadavs - 10:38 am on Sep 14, 2011 (gmt 0)
My site dropped to the fifth page for most keywords, so it seems like a -50 penalty.
However, I changed my domain name on September 1, and it seems like no-one had any complaints recently about any penalties, so it may just be a very slow work of Google on crawling the new domain.
Webmaster Tools show 238 links from the old domain (I have 301 redirects for all pages), and only 13 links from a different domain.
The website itself wasn't changed except for some banners (with the new name) and the site name itself on pages.
What do you think?