mhansen - 8:14 pm on Aug 22, 2011 (gmt 0)
Sounds like a manual penalty to me. Are all the sites using anything in common that would enable a Googler to burn down the entire house with one match?
- Same Adsense Account
- Same Webmaster Tools
- Same Analytics
- Same GoDaddy or Registrar Account
- Same Domain Owner (You)
- Same Hosting or Server