In guake, if I press "F12", I get the semi-transparent HUD-like terminal as expected. But if I then press "ctrl-shift-t" to open another tab, the new tab will not be transparent any more. Is this a bug or a feature?
I just installed Guake in Ubunut 13.04 using:
It installed version 0.4.4, and all tabs are transparent. See images below.
I think it might be something wrong with your setup.