I made this screenshot in a reduced window size and reduced the image size too. It is the same effect in fullscreen view. See attached.
This is strange. I tried the demo.pligg.com on
http://ipinfo.info/netrenderer/
and the screenshot look fine too.
I could only imagine it is really in relationship with my Display resolution. But I had never ever this effect bevor on a site I was testing with IE6.
I have a Notebook with 1920x1200 resolution. So I use 120dpi in the windows settings. I dont know if it is because of the dpi, but internet explorer displays pictures and text a lot bigger then FF. So Pics look boring because they are blown up. Firefox displays pics in native resolution. But because all is blown up in same ratio I never see something like this (only if there was css bug).