Apparently, on the Android app, playlists won't work if they have a "/" in the name. It will work on the web interface, but when I try to access via the Android app (on my S3), it pops a java error, stating it can't be found.
I just renamed it to replace the / with a -, and it's working fine. Can't say if this has already been fixed in the Android app, as I'm running the 5.0 version (need a job first before I can buy the latest and greatest!)