I have found a bug with a few applications such as Gimp 2.8 and TuxGuitar on 12.04. Whenever I start the application, its icon will not appear on the Alt-Tab switcher and it will not appear on the ...
For example, the window that lets me view my keyboard layout does not have a launcher icon. The Unity launcher show a grey question mark instead, which does not feel pretty. Having more than one such ...