To be honest I'm not entirely sure. Most of the actual communication is done via pianobar which opens a stream to the Pandora Radio. I haven't added any coded to deal with sound output, or integrate in with the N900 at all... it just uses whatever the system default sound configuration is. Does the same skipping occur if you're playing an mp3? Or streaming from the website? A better test might be listening to an online radio station? It could be something with the phone.. but I am unable to test any phone-specific issues as I don't have one. It seems like it could be related to threading and how the CPU handles multi-tasking.. as this is very noticeable on, say, the old N810. But how the default media player would work around it I don't know. I'm glad that, for the most part, the app seems to do as you require.