Variable results

Last night, looked at the robot problem I was having with different lighting conditions between the robot operation and the picture download. Could I reproduce it? Of course not. But the lighting conditions were not the same - it was dark outside last night, but light when I noted the problem - so it could be an issue with that.

So we (Alan and I) looked at why vertical lines seem to be rotated ok, but horizontal lines appear to be being rotated the opposite direction. No clues yet.