[apport] beryl-settings crashed with TypeError in BindingIsVisibleMethod()

Binary package hint: beryl-settings

I was in beryl-settings under Accessibility and I clicked on the Opacify to enable it and it crashed.

ProblemType: Crash
Architecture: i386
Date: Fri Apr 13 16:29:11 2007
DistroRelease: Ubuntu 7.04
ExecutablePath: /usr/bin/beryl-settings
InterpreterPath: /usr/bin/python2.5
Package: beryl-settings 0.2.1-0ubuntu1
PackageArchitecture: all
ProcCmdline: python /usr/bin/beryl-settings
ProcCwd: /home/joey
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=en_US.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/beryl-settings']
SourcePackage: beryl-settings
Traceback:
 Traceback (most recent call last):
   File "/usr/bin/beryl-settings", line 831, in BindingIsVisibleMethod
     dat = ' '.join( model.get(iter,0,1,3) )
 TypeError: sequence item 2: expected string, NoneType found
Uname: Linux joeyubt 2.6.20-14-generic #2 SMP Mon Apr 2 20:37:49 UTC 2007 i686 GNU/Linux