None translate.googleusercontent.com blocked by AdSense

[GA]

In my AdSense account, i find under "Reports | Site Diagnostics" a lot
of entries like this:

http://translate.googleusercontent.com/translate_c?hl=de&sl=en&u=...

Reason Blocked:
ROBOTS.TXT File

I have posted this in the AdSense forum already, but did not get any
useful replies.
http://www.google.com/support/forum/p/adsense/thread?tid=260fdde2dc63b39d&hl=de