Cannot add or edit movie propeties after saving preferences

Version 0.9.5 on Gentoo Linux

Steps to reproduce:
1. Open griffith
2. Open the preferences window
3. Click Save button
4. Try to add or edit movie
Properties window does not appear.

When I restart griffith preferences are saved and I can add movies.

Logs from running with --debug option
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running on posix - Linux
Traceback (most recent call last):
  File "/usr/bin/griffith", line 269, in add_movie
    add.add_movie(self)
  File "/usr/share/griffith/lib/add.py", line 38, in add_movie
    set_details(self, details)
  File "/usr/share/griffith/lib/add.py", line 183, in set_details
    pos = gutils.findKey(int(self.config.get('vcodec', 0, section='defaults')), self.vcodecs_ids)
TypeError: int() argument must be a string or a number
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