John,
(1)I have noticed that when editing a message the same thing happens sometimes, but only when you use the top right link to get back to the main forums page. I have been using the "back" button to get back and they are not all lit (using IE4.01, I use the newer "down" button to go back directly to the beginning, instead of "back" 3 or 4 individual page clicks to get back)
(2)I have noticed that if the lights are a little screwy I just link to some other page off your site, then link back and they are alright. Sometimes "refreshing" twice instead of once fixes it also.

-RodW