Comment 3 for bug 565648

I have the very same problem.
Running u1sdtool -c has no effect, it seems to be a bug within ubuntu one...

Here is the output of rhythmbox started from a terminal:
** (rhythmbox:3410): DEBUG: Loading the real store page

** (rhythmbox:3410): WARNING **: Syncdaemon already connected, not connecting again

liboauth: data to sign='GET&https%3A%2F%2Fone.ubuntu.com%2Fmusic%2Flogin&oauth_callback%3DNone%26oauth_consumer_key%3Dubuntuone%26oauth_nonce%3DFMOUtxEopgzqPFqYALh9w1Qoe7G%26oauth_signature_method%3DHMAC-SHA1%26oauth_timestamp%3D1272920111%26oauth_token%3DXhdLW5bVzdxBXnK0031z%26oauth_verifier%3DNone%26oauth_version%3D1.0'

liboauth: key='hammertime&x7GfD1KfKvFvnnDbb3Qf6pfbSlCWmKmVXDbG2DjZQkxhqVd4kp8TXWbjWPkqXZNHht617l2tBkfmBWPb'

** (rhythmbox:3410): DEBUG: navigation requested to https://one.ubuntu.com/music/login?oauth_callback=None&oauth_consumer_key=ubuntuone&oauth_nonce=FMOUtxEopgzqPFqYALh9w1Qoe7G&oauth_signature_method=HMAC-SHA1&oauth_timestamp=1272920111&oauth_token=XhdLW5bVzdxBXnK0031z&oauth_verifier=None&oauth_version=1.0&oauth_signature=GTZcBV4E%2BJd3d%2FKjo34lMBi%2BAo8%3D
Segmentation fault