Currently when tabbing to the Lightbox, the first item is never focused or appears to be selected. The Lightbox functions but there are no visual cues to show this (i.e. having the first item selected).
Internet Explorer 6 & 7 can not focus on the DIV element containing the Lightbox. Because of this, when tabbing to the Lightbox the first item in the Lightbox will not gain focus or change to the selected style.
Theoretically tabindex 0 should allow IE to focus on non-focusable elements. Placing Tabindex="0" on the container DIV does not appear to have any effect. However, placing a tabindex of "0" on the thumbnail div of the first item will give it focus when tabbing through.