Re: fwd: advanced html list: ad blocking soft ware questions:

> 2) if other ad-blocking software causes such results, and most
> importantly,

Netscape 6 has a block any image not from the current site option.
I suspect this is the heuristic that your software is using.

In any case, unless the images are the essence of the site, it should
not fail if they are replaced by their alt text.