@AndyC: The border around the executable would've helped with the gpj.exe RLO thing. A border is maybe not a good example, but visually distinguishing executable files in a way that icons can't mimic wouldn't be a bad thing (it could be a different colour or something, we already have blue for compressed folders). Of course, in details view you can already spot the different if you look at the Type column, but that isn't always available.
The character similarity, I'm not sure what could be done about that, if anything.
