I pressed a button and I dunno what i did. :C
http://bin.smwcentral.net/u/23808/ml3d.png
In the texture coordinate editor, there is no mesh. Before I did whatever it is I did to screw this up, there would be the mesh of the selected model/group/whatever, but now there is not.
Does anyone have any idea what it is I did and how I can undo it? I have no clue.