Spotify is using over 60% of the CPU on my 4 core system (0-400%) if the app is open, not logged in and not the active window. It ramps up to over 200% when it is the active window but not logged in. It does however quickly drop to a few percent when logged in and streaming. I was surprised and thought those that use Spotify should be aware as this could be running down your battery without you knowing it as most don't keep an eye on their CPU usage. Update: The high CPU Usage has been remedied by upgrading to 126.96.36.199. If you are running an older version of Spotify with high CPU Usage, updating the app should remedy it. Update 2: CPU usage was at 100% today when not using Spotify. 188.8.131.52 lessened CPU usage, but did not in fact remedy it.