Slurp Vulnerability Testing/DB Exploitation?

Slurp

[moreIdeas]

I'm performing the daily ritualistic review of logfiles and suprised to see Slurp performing something that appears to be parameter manipulation of this websites' url. e.g somefile.php?tag1=echo /etc/.
Its possible Slurp has discovered a flawed parameter via some scripting or db error, but, this path is used nowhere on the site.
So it made me wonder. Is Yahoo attempting to gather this private information? Probably not, but a scary thought.

[abates]

a couple of possibilities:

1. It's not Slurp at all but someone setting their user agent (did it come from Yahoo's IPs?)

2. Another site has linked to somefile.php?tag1=echo /etc/ and Slurp is merely following the link. Searching for your domain name might locate the culprit?