I installed Ubuntu One Files on my Nexus One phone. When I tap Log in on the main screen, the app tries to log in then after a few seconds returns the following message:
Log-in failed, please try again later.
I have an Ubuntu One account, and when I tap Register on the main screen for Ubuntu One Files, I can log in using my phone's Web browser. But if I go back to the app and try to log in, I get the same error.
Again, my phone is a Nexus One running Android 2.3.4. The phone is not rooted or modded in any way.