>>/_What make you think it's the server?

>>Nice catch :-) It's my bet too. Browser rendering?

> That's what I'm thinking.  Apache doesn't care what kind of file it is. 
> I have noticed Netscape 4.79 won't render a PNG correctly (black becomes
> transparent, transparent becomes off-white).  I had to use GIF's and
> JPG's because I know those will render correctly in all browsers.
> 
> You could put lynx to the test like so: lynx -crawl -traversal -realm
> -image_links http://yoursite.com and see what happens.  If you get the
> same results with PNG's and JPG's/GIF's, then it's not apache.

Netscape 4.xx uses Quicktime to render pngs.  I don't think Netscape is at fault 
for them being misdrawn.