I'll update this one as I'm having the exact same problem.

All three Spotify apps keep crashing while sign up. I just changed from HTC Desire to Nokia N9. I was previously using Spotify on my Desire, my laptop and my computer. Now I'm trying to replace Desire with N9. App seems to work for a while if I uninstall it, reboot and reinstall but crashes eventually and after that every time I try to log in.

Any help?

(PS this is my first post, hope I didn't violate anything )