This just started happening to me today after the latest update as well. I am also on HTC Droid Incredible 2 (Android 2.3.4). Music will still play and I can control it with my inline remote, but I have a white screen. Tried killing the app, asked if I wanted to force close, hit yes, and music keeps going...
I restarted my phone earlier and that fixed it at the time, but now it has happened again. FWIW I notice it after playing music and unlocking directly into Spotify (through widget locker), but thats pretty much how I always open it, so hard to say if that's the cause.
I have the same problem as everybody in this forum. Everything started with the last Spotify update. If I reinstall the app and restart the phone i get to the login page, I have to select all the lists that I want to download. When I do it it starts, but if open another app and back to Spotify I get the blank screen, but in the Android toolbar I can see that it's downloading and the % of songs left. I have more than 9Gb free in a 16Gb sd card.
-HTC Desire S
As you can see the notifications screen shows that Spotify is working but I can't access to the app...