[gb2world]

You might consider it a minor bug if you are harsh? To account for it, QT would need to know that you are going to add a border, and how wide it will be, and account for it. They are resizing the image based on the admin setting, then setting the css for the container based on the same setting, so you can't fix it without another variable. (The administration setting does not know that you are going to add a border, and does not consider it. Might be easier for them to add an option to add a border in the administration, or just add the 2px that you did just in case someone does this.)