django 部署问题陷阱

部署环境：ubuntu 8.04,python2.5, django1.0,
deployment server: nginx0.67 + fastFcgi + django

在使用development server开发好系统后（正常运行 ），部署到上述服务器环境中

有些url请求会产生 unhandled exception throwed by app, 但在development server环境下

完全正常，郁闷极了。

查看nginx.error:
Traceback (most recent call last):
  File "build/bdist.linux-i686/egg/flup/server/fcgi_base.py", line 558, in run
    protocolStatus, appStatus = self.server.handler(self)
  File "build/bdist.linux-i686/egg/flup/server/fcgi_base.py", line 1112, in handler
    result = self.application(environ, start_response)
  File "/usr/lib/python2.5/site-packages/django/core/handlers/wsgi.py", line 239, in __call__
    response = self.get_response(request)
  File "/usr/lib/python2.5/site-packages/django/core/handlers/base.py", line 67, in get_response
    response = middleware_method(request)
  File "/usr/lib/python2.5/site-packages/django/middleware/common.py", line 56, in process_request
    if (not _is_valid_path(request.path_info) and
  File "/usr/lib/python2.5/site-packages/django/middleware/common.py", line 142, in _is_valid_path
    urlresolvers.resolve(path)
  File "/usr/lib/python2.5/site-packages/django/core/urlresolvers.py", line 246, in resolve
    return get_resolver(urlconf).resolve(path)
  File "/usr/lib/python2.5/site-packages/django/core/urlresolvers.py", line 181, in resolve
    sub_match = pattern.resolve(new_path)
  File "/usr/lib/python2.5/site-packages/django/core/urlresolvers.py", line 181, in resolve
    sub_match = pattern.resolve(new_path)
  File "/usr/lib/python2.5/site-packages/django/core/urlresolvers.py", line 181, in resolve
    sub_match = pattern.resolve(new_path)
File "/usr/lib/python2.5/site-packages/django/core/urlresolvers.py", line 181, in resolve
    sub_match = pattern.resolve(new_path)
  File "/usr/lib/python2.5/site-packages/django/core/urlresolvers.py", line 124, in resolve
    return self.callback, args, kwargs
  File "/usr/lib/python2.5/site-packages/django/core/urlresolvers.py", line 130, in _get_callback
    self._callback = get_callable(self._callback_str)
  File "/usr/lib/python2.5/site-packages/django/utils/functional.py", line 130, in wrapper
    res
看提示好像是调用view之前发生了错误，解析url时出错，
关键是只是部分url请求会出错，有些又不会出错

本来想使用django-debug-tool用在production server上进行查看问题，但好像不能使用，
django-debug-tool只能用在development server上吗？

还有没有其他方法可以捕捉到这些 unhandled exception吗？

对了，开发时用python2.6，不知这个有没有影响

any help?
thanks advanced!!