Control-Q works for me in ubuntu 11.04 with the default interface Unity.
Here, this workaround is fine in ubuntu 11.04 with ubuntu classic (but it fails with Unity)
Edit -> Preferences -> Extension tab: Enable notification area icon
When you close banshee the audio does not stop yet but you just have to right -click on the icon to properly quit banshee.
Control-Q works for me in ubuntu 11.04 with the default interface Unity.
Here, this workaround is fine in ubuntu 11.04 with ubuntu classic (but it fails with Unity)
Edit -> Preferences -> Extension tab: Enable notification area icon
When you close banshee the audio does not stop yet but you just have to right -click on the icon to properly quit banshee.