This is the screenshot from the error's output:

Traceback (most recent call last):
File "/Users/Shared/adium updater.py", line 82, in
doc = minidom.parseString(urllib.urlopen(url).read().decode('iso-8859-1').encode('ascii', 'xmlcharrefreplace').replace('& ', ' ').replace('', ''))
File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/urllib.py", line 82, in urlopen
File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/urllib.py", line 185, in open
File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/urllib.py", line 204, in open_unknown_proxy
IOError: [Errno url error] invalid proxy for http: '127.0.0.1:8118'

Maybe a python configuration error because I'm using a Vidalia/Tor proxy? What's the solution?