Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/picard/ui/mainwindow.py", line 795, in browser_lookup
    self.tagger.browser_lookup(self.selected_objects[0])
  File "/usr/lib/python2.7/site-packages/picard/tagger.py", line 445, in browser_lookup
    item.filename if isinstance(item, File) else '')
  File "/usr/lib/python2.7/site-packages/picard/browser/filelookup.py", line 130, in tagLookup
    return self._build_launch('/taglookup', params)
  File "/usr/lib/python2.7/site-packages/picard/browser/filelookup.py", line 43, in _build_launch
    return self.launch(self._url(path, params))
  File "/usr/lib/python2.7/site-packages/picard/browser/filelookup.py", line 39, in _url
    url = build_qurl(self.server, self.port, path=path, queryargs=params)
  File "/usr/lib/python2.7/site-packages/picard/util/__init__.py", line 412, in build_qurl
    url.addEncodedQueryItem(k, unicode(v))
UnicodeEncodeError: 'latin-1' codec can't encode characters in position 0-7: ordinal not in range(256)