u1sdtool – publishing files sometimes fail

[Guraknugen]

$ cd /some/place
$ u1sdtool --publish-file "04. Mr. Moto.flac"
/usr/lib/python2.7/dist-packages/ubuntuone-client/ubuntuone/platform/tools/__init__.py:484: UnicodeWarning: Unicode equal comparison failed to convert both arguments to Unicode - interpreting them as being unequal
  success_filter=lambda info: info['path'] == path,

Then nothing more happens, it's not going back to the prompt, which is very inconvenient in a script…
I tried this a few days ago with the above described result, but yesterday it worked perfectly. However, today it seems to be the above described situation again.

I'm a little confused by the error message: ”Unicode equal comparison failed to convert both arguments to Unicode”. What two arguments?

The bug, as I see it, in this case, is that it doesn't get back to the prompt and the error message doesn't seem to be complete…

And why did it work yesterday? The file was exactly the same…

Another funny detail is that the publishing seems to actually take place, I just get an error message instead of the URL…

$ u1sdtool --version
u1sdtool - Version 3.0.2
$ lsb_release -d
Description: Ubuntu 12.04.4 LTS
$

In the example above, the named file existed in the current directory. I have also tried typing the whole path to the file, but that didn't help.