Comment 3 for bug 475738

a few days back my u1 client on Lucid stopped to synchronize with the message:
$ u1sdtool -s
State: CAPABILITIES_MISMATCH
    connection: With User With Network
    description: capabilities mismatch
    is_connected: False
    is_error: True
    is_online: False
    queues: WORKING_ON_BOTH

Several other clients (on Precise or even the android client) for the same account works fine.

There is a thread with several other affected users on ubuntu forums:
http://ubuntuforums.org/showthread.php?t=2150538&p=12673088