Media key lock when running - to stop iTunes launching
Other Media players on OS X, such as Clementine or Spotify stop iTunes from launching when the play media buttons is pressed. Which I find rather annoying, and something which puts me off Apple that little bit every time it happens, but that's my own issue of course.
In the past I've run a script called MMFix, but this no longer works on Mountain Lion. At the moment I'm using a workaround of leaving Quicktime running, but this seems like overkill.