Can anyone help me with this error?

I believe it's due to a problem in glade2, however I can't pin it down.

Last action I took was to install glade2-2.12.1-6.el5.i386.rpm.

It's Centos EL5.
Linux mdd01 2.6.18-164.15.1.el5 #1 SMP Wed Mar 17 11:37:14 EDT 2010 i686 i686 i386 GNU/Linux

DeVeDe 3.16.5
Locale: en_US.UTF-8
Using local-installed files
Traceback (most recent call last):
File "/usr/local/bin/devede", line 146, in ?
AttributeError: 'module' object has no attribute 'Builder'

Thanks in advance!