Yeah, the 32-bit Linux version (the 64-bit version has the new UI IIRC) is the way the Spotify client used to look before they switched over to WebKit. I wish it was possible to go back to that on Windows - it was much snappier and didn't have lots of pointless padding between song titles.
From the two computers I've used with spotify clients on the Linux version is far snappier and more responsive (as in responds to commands sometime within the current minute) than the OSx version.
According to their blogs etc the main purpose of the Linux version is internal use by spotify developers working on Linux workstations - it is only released to the public because, "why not?". I wonder if this is why the Linux version is 'behind' the windows/OSx versions but actually works better. I.e. they dogfood it more but don't feel the need for constant UI 'improvements'.
