Hopefully Epic Staff is making note of that still happening.
My opinion (and I have a day job that has to deal with browser heavy piles of front end code) is that since they are making that list box do dual duty, they must have a background load of its contents since it changes its contents on the fly (probably AJAX). First thing I’d do is try a different (and current) browser from the one you are using. It takes almost nothing to trigger an event that will mess up the list box load, just an errant click.
They should have two list boxes, one for the category and another for the version tag. Looks like they hacked the normal forum code’s single list box to provide the ability to require the version tag. Sure seems like they need to have their contractor look at it after all the people who’ve had this issue. It does work for me now though once I understood it.
I think some people just gave up and post their questions as regular topics. Not ideal, but it works.