Thanks UPT, that's very helpful. Still can't reproduce it, but information is always good.
I went ahead and added player options to the Tables tab context menu (bust out, add-on, etc). I rearranged the context menu options into table options, seat options, and then player options, so I think it's a decent mix without being overwhelming. Time will tell. While I was at it, I did some work on other context menus, removing the overuse of dividers. Again, we'll see how people like or dislike the change.