Along with the Disallow: /urchin_test/
that Philipp post about earlier
http://blogoscoped.com/forum/68275.html

I also noticed that

Disallow: /base/search?

is now on the list.
This could mean that Google Base results pages cannot be crawled.

It seems they exclude search results from being crawled, which is always the right thing to do...

It seems they don't (or they didn't):
http://googlesystem.blogspot.com/2006/06/search-google-searches.html

[Moved from new thread "Robots.txt Update". -Philipp]

Disallow: /base/search?
Disallow: /urchin_test/

What's up with the Urchin test...New Google Analytics?