I just downloaded the IE8 full release so I could test a site I just created. [Example Deleted]
Focus on the left sidebar background image. It is suppose to be a 1x1 se
Thanks for the help on this issue -- what a weird bug.
I was also experiencing the issue on 50% of the computers running IE8 (had access to quite a few machines). When I had a 1x1px semi-transparent png set as a background image on a div with CSS, IE would render this as a funky vertical, transparent gradient.
Changing the source image to a 5x5px png of the same opacity fixed the bug... go IE!