Clicking the "Start" button doesn't always enabling pg.
Sometimes, it just printing the message "Starting Peerguardian..." at the bottom of the window, but nothing else.
Then I have to click again the "Start" button and everything is working properly (brings up the pwd box and enabling pg).
Right-clicking the tray button -> Start, is always working.
My system is Kubuntu 12.10 x64 (KDE 4.9.5).
PGL v.2.2.2 (from ppa).