Here's one example:

http://confluence.atlassian.com/display/CONFEXT/UWC+SSL+Support

These image thumbnails should have a 1px black border, but they do not. Oddly enough, they do have a border if you view them in the RTE.

The border=1 attribute is applied. It's visible in the HTML. However, it's being overridden by the {{a img { border:none; } }} declaration in the master.css.

The right way to fix this is make the border applied via CSS instead of the old HTML attribute border=1.