angiolo - 12:08 pm on May 3, 2010 (gmt 0)
I have the same experience with google.de.
A site that was ranking fine for several keywords moved from the first page to the third page. It seems to me like a small penalization: most of the page had been cached two-three days ago. Only the index had been cached one month ago!
What I recently did were some press released but nothing that could be defined "spam".
I hope that it's only a temporary glitch.....