>Thanks for the suggestion. I did remove IE's temporary files, and also reverted back to the WinXP default theme and color scheme temporarily, but it made no difference - the check boxes still have a border in IE7. Please don't spend any serious time looking for the cause of this on my behalf, though. AFAIC it's not a problem, it's just a curious little anomaly.

I did a small test and found that the old stylesheets of members were not removed since a while. I did it manually on your account so this is now fixed. I will however adjust the robot to make sure the old stylesheets are being removed.