You can easily check what version you're running. Start the Spotify app, go to More - About and there you will find the version information. I was running 0.4.12.180 (41200180), installed from Android Market. I've installed a "preview version" from http://www.spotify.com/nl/download/previews/, but I think it's an old one (my version number is now 0.4.9.175 (40900175)).
With both versions: as soon as I make an album offline available, the app crashes two/three seconds after starting it. Only thing I can do then is delete everything and only stream music =/