Trac installation problem

Hi

I've used both the DreamTracInstall script and also the Natmaster instructions in an attempt to get Trac installed on our hosting. No matter what I do, I always end up with the same error when I go to our trac page:

Trac detected an internal error:

'trac.web.auth.LoginModule' object has no attribute 'ignore_case'
Traceback (most recent call last):
File "/home/leemhenson/packages/lib/python2.3/site-packages/trac/web/fcgi_frontend.py", line 40, in _handler
dispatch_request(req.path_info, req, env)
File "/home/leemhenson/packages/lib/python2.3/site-packages/trac/web/main.py", line 139, in dispatch_request
dispatcher.dispatch(req)
File "/home/leemhenson/packages/lib/python2.3/site-packages/trac/web/main.py", line 83, in dispatch
req.hdf = HDFWrapper(loadpaths=chrome.get_all_templates_dirs())
File "/home/leemhenson/packages/lib/python2.3/site-packages/trac/web/chrome.py", line 194, in get_all_templates_dirs
for provider in self.template_providers:
File "/home/leemhenson/packages/lib/python2.3/site-packages/trac/core.py", line 160, in __getattr__
return [self.compmgr[cls] for cls in extensions
File "/home/leemhenson/packages/lib/python2.3/site-packages/trac/core.py", line 191, in __getitem__
component = cls(self)
File "/home/leemhenson/packages/lib/python2.3/site-packages/trac/core.py", line 90, in maybe_init
init(self)
File "build/bdist.linux-i686/egg/acct_mgr/web_ui.py", line 98, in __init__
File "build/bdist.linux-i686/egg/acct_mgr/web_ui.py", line 101, in _enable_check
File "/home/leemhenson/packages/lib/python2.3/site-packages/trac/core.py", line 165, in __getattr__
raise AttributeError, "'%s' object has no attribute '%s'" % (cls, name)
AttributeError: 'trac.web.auth.LoginModule' object has no attribute 'ignore_case'

Has anyone else come across this problem before? I've done some reading around the net but haven't found this specific problem mentioned anywhere else. This leads me to think it must be something to do with my installation environment, but I don't have enough experience of linux installs to know where to look or what to look for in terms of a solution.

Any help would be appreciated.

Cheers
Lee