one of my opera side panels was on (width 40px) and it complained, and I gave up and came back to read the comments, then went back in and switched the panel off and it was fine. I would suggest, why not work out exactly how many pixels it has to be to not look rubbish. then set the limit at that. or, put it as a warning that it could look much better as it is intended to be used at a higher res. Once read, the message can then be dismissed?