Oh yes, the Blank List of Blocking Your Interface. I've always been able to get it to go away by quitting out of the MA system and then going back in, but... hrmm... you tried that and it didn't work.
did you try /reloadgfx ?
"City of Heroes. April 27, 2004 - August 31, 2012. Obliterated not with a weapon of mass destruction, not by an all-powerful supervillain... but by a cold-hearted and cowardly corporate suck-up."
Yeah, that didn't work either.
When I tried loading the MA after a test run, a black, unmovable box appeared in the middle of my screen and I can see half of the MA. It looks like a drop down list, but it's completely blank. I tried reloading and quiting but it's still there. Has anyone else encountered this?