Hi i do not know if this is a bug or not, but a checked checkbox can be displayed in two ways : 1. background of the checkbox is sunken. 2. background is not sunken (which is "wrong" in my opinion if the checkbox is checked). you can get the "wrong" state when you do the following : -click a checked checkbox but do not release the left mouse button. - mouve the mouse cusor out of the checkbox - then you can release the mouse button and you will see the not sunken background. i'd like to attach an image that show the problem, but do not know how :( i am using Mozilla 1.1b Gecko/20020805 Linux version. but the problem occurs with the windows version as well.
*** Bug 162805 has been marked as a duplicate of this bug. ***
That's the "focused" look of the checked checkbox. You can also get there by just tabbing to the checkbox or by checking an unchecked checkbox.... In any case, it is not a bug, it is a way to denote the checkbox having focus.