Side note: how does/ought a checkbox that is both checked and disabled look? I haven't skinned a checkbox since Mac OS 9, but my experience from then involved creating checked and unchecked versions of disabled, normal, and active checkboxes, and I haven't seen any examples of disabled checked ones here. Is the checkmark still bright green on disabled checkboxes? The colour might throw people off if they're expecting the checkmark to be greyed-out as well as the box.