404 not found error

strange errors...

[macrost]

Ok, I have setup an emailer for any 404 errors that happen on my site. The weird thing is some of the stuff that is coming through.

The information for this error is:
Referring URL: http*://www.domain.com/cis/photos.htm
Browser Type: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
Any query string values: 404;http://www.domain.com/cis/none
Remote IP: 216.82.196.252

Now in my 404 page, I set response.status = "404 Not Found" for the search engines, but what boggles me is this:
http*://www.domain.com/cis/none
I looked through the code and there was only one instance for none (background="none") which was an attribute for a table tag! I have taken over the site maintenance and this is confusing me, because after I removed that background attribute, the error still comes through, and there isn't a sub of that sub called none.
Any thought or ideas?

Mac
[edit]
delinked
[/edit]

[plumsauce]

you might want to consider the possibility that the
request is/was generated by a poorly impemented
site scraper. also, that the link might exist offsite
somewhere.

look at the referer, look at the rate of requests
from the same client in the time period around
the bad request.

++++