Are you running 1.0.2? In 1.0.2, Kagu goes into a low CPU state when it loses focus (i.e. goes into the background). You should be able to multi-task with Kagu in the background so long as you aren't running A2DP. If you're referring to A2DP playback, then yes, sorry, but A2DP requires a lot of CPU currently. That isn't Kagu's fault and there isn't a whole lot Kagu can do about it. At least you *can* run A2DP. Kagu is the first media player for maemo to include a UI for A2DP playback after all.