=== SYSTEM INFORMATION:
Quod Libet 3.1.0
Mutagen 1.22
Python 2.7.6 (default, Feb 26 2014, 12:07:17) 
[GCC 4.8.2 20140206 (prerelease)] linux2
Platform Linux-3.14.1-1-ARCH-x86_64-with-glibc2.2.5

=== STACK TRACE
Traceback (most recent call last):

  File "/usr/lib/python2.7/site-packages/quodlibet/qltk/pluginwin.py", line 165, in cell_data3
    render.set_property('text', plugin.name)

AttributeError: 'NoneType' object has no attribute 'name'