works for me... the gksudo statement suffers from the same problem probably.
The check_mp3 is pretty braindead, it just checks whether the kdsudo/gksudo was successful (the kdesudo succeeds, it's the executed command that fails but that error code will be eaten probably).
As a patch... replacing the kdesu line by:
kdesu -d "adept_batch update ; adept_batch install libxine1-ffmpeg"
works for me... the gksudo statement suffers from the same problem probably.
The check_mp3 is pretty braindead, it just checks whether the kdsudo/gksudo was successful (the kdesudo succeeds, it's the executed command that fails but that error code will be eaten probably).