I don't think you're talking about what I'm talking about.
(But maybe you do, read on..)
Maybe it's my video card playing tricks on me and everyone else doesn't notice because their card isn't doing it. Because,
all of my renders do this. But if I open it in Windows Picture Viewer it distorts the image and apparently 'patches' it up. So say I press print-screen while viewing it in WPV* and paste it in a program and save it as a new file, it looks perfect. So I present a screenshot of a comparison between 'render' and WPV-screenshot.
Sorry if this is a little off-topic. Perhaps someone could merge these last few posts into a new topic?
Click (Circled in blue is the "bad" render, and the other one is the "good" WPV one)
Attached is the better entry just to have it here.
3DGeek