Ubuntu Tweak 0.8.3 "window" module, crashed

[Nethan]

Latest version version of Ubuntu Tweak on Ubuntu 13.04 development.
Module "window" crashes and i can't enter in it.

[Nethan (gltch2003)]

Distribution: Ubuntu 13.04 raring
Application: Ubuntu Tweak 0.8.3-1~precise1
Desktop:ubuntu

Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/ubuntutweak/main.py", line 498, in _load_module
    page = module()
  File "/usr/lib/python2.7/dist-packages/ubuntutweak/tweaks/window.py", line 64, in __init__
    if len(close_pattern.findall(button_value)) == 1 and 'close' in button_value:
TypeError: expected string or buffer

Sorry, i forgot to attach error code before