I think there is something else going on in this search, than just a search as there is a compressed javascript file involved (see image), so I don't know why all this gubbins would be behind your search string.
If the google search tries in any way to across the site then it would bump into the Network Shield as currently the is blocked by it. But this seems to have bypassed the network shield check in the google search.
Re, the google safe browsing, because of the nature of this site there are going to be people using it to hide what they are doing and it may get flagged by association.
However, in your reply in another topic (
http://forum.avast.com/index.php?topic=64315.msg543760#msg543760), the avast virus labs have acknowledged an FP, based on the actual site alone and are to correct it.
I did a google search on anonymouse.org (only this and no http :// or www .) whilst investigating in the other topic and I got no alert on the google search in firefox 3.6.10.