I have an "All Music" folder with all my playlists in it that I use to listen to all my songs on shuffle. However, I've noticed that in the Android app, when I resume playback after an hour or two, it loses my position in the playlist and only the song I was listening to was saved (when it finishes, nothing else plays). So I have to navigate back to the playlists list and choose All Tracks again.
This was actually an issue with individual playlists as well, but was fixed earlier this year: http://community.spotify.com/t5/Spotify-Ideas/Store-playlist-position-on-Android-the-same-way-as-it-...
Could this be fixed for folder playback as well? It's very annoying and I've actually resorted to taking all my tracks from other playlists and putting them in a single playlist just for this purpose. It would also be nice to have a "Shuffle All" button at the top of the All Tracks view like there is on individual playlists.