I have just noticed that when editing a thread of mine in the beta forums, I couldn't pick any of the user maps & mods specific icons. Err... help?

specifically, the thread is this one. As you see, its got the default icon on it (the little piece of paper), but it should have the red DM map icon on it. When I tried to edit it, only the normal set of smilies etc. were available.

Is there any way it can be done?