The problems were due to third party libraries in Ubuntu, not Spotify's code. It takes time for updated libraries to make it into Linux distributions.
It's not helpful to have a pop at Spotify for this. The app was seg faulting on a given linux distribution for bugs which were not in their code. This is a project that appears to be done mainly from the good will of staff interested in making a Linux offering as opposed to leaving us completely in the cold, like most commercial organisations.