I keep having to switch on the High Quality Streaming setting, which is of course annoying!
I suspect the setting is being reverted whenever the Spotify client is updated. I should not have to keep checking the setting and switching it back on. I can't help think this bug is actually thought of as a feature by those counting the dollars at Spotify HQ.
But seriously if you're paying for premium by default the premium features should be switched on. By default premium features should NOT be off. You pay for premium... you should get premium !!
Also there should be some sort of status icon to indicate the bitrate you are listening to.