I have the same problem when trying to use ipdevinfo

Here goes my full output (with debug enabled):

Environment:

Request Method: GET
Request URL: http://nav.pmj.gov/ipdevinfo/pmj-swi541.pmj.gov/
Django Version: 1.0-final-SVN-unknown
Python Version: 2.5.2
Installed Applications:
[]
Installed Middleware:
('django.contrib.sessions.middleware.SessionMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.middleware.common.CommonMiddleware')


Template error:
In template /usr/local/nav/lib/templates/ipdevinfo/ipdev-details.html, error at line 150
   Caught an exception while rendering: Reverse for 'nav.rrdviewer-rrd-by-ds-tf' with arguments '('', u'day')' and keyword arguments '{}' not found.
   140 :                 for {{ netbox.up_since|timesince }}


   141 :             {% endifequal %}


   142 :         </td>


   143 :     </tr>


   144 : 


   145 : {% with netbox.get_availability as stats %}


   146 :     <tr>


   147 :         <th>Availability</th>


   148 :         <td>


   149 :             {% with stats.availability as a %}


   150 :                 <a href=" {% url rrdviewer-rrd-by-ds-tf a.data_source.id,"day" %} ">


   151 :                     {% if a.day %}


   152 :                         {{ a.day|floatformat:2 }}%


   153 :                     {% else %}


   154 :                         (N/A)


   155 :                     {% endif %}


   156 :                     last day</a>,


   157 :                 <a href="{% url rrdviewer-rrd-by-ds-tf a.data_source.id,"week" %}">


   158 :                     {% if a.week %}


   159 :                         {{ a.week|floatformat:2 }}%


   160 :                     {% else %}


Traceback:
File "/var/lib/python-support/python2.5/django/core/handlers/base.py" in get_response
  86.                 response = callback(request, *callback_args, **callback_kwargs)
File "/usr/local/nav/lib/python/nav/web/ipdevinfo/views.py" in ipdev_details
  298.             processors=[search_form_processor]))
File "/usr/local/nav/lib/python/nav/django/shortcuts.py" in render_to_response
  67.     rendered = render_to_string(template_name, context, context_instance)
File "/var/lib/python-support/python2.5/django/template/loader.py" in render_to_string
  107.     return t.render(context_instance)
File "/var/lib/python-support/python2.5/django/template/__init__.py" in render
  176.         return self.nodelist.render(context)
File "/var/lib/python-support/python2.5/django/template/__init__.py" in render
  768.                 bits.append(self.render_node(node, context))
File "/var/lib/python-support/python2.5/django/template/debug.py" in render_node
  71.             result = node.render(context)
File "/var/lib/python-support/python2.5/django/template/loader_tags.py" in render
  97.         return compiled_parent.render(context)
File "/var/lib/python-support/python2.5/django/template/__init__.py" in render
  176.         return self.nodelist.render(context)
File "/var/lib/python-support/python2.5/django/template/__init__.py" in render
  768.                 bits.append(self.render_node(node, context))
File "/var/lib/python-support/python2.5/django/template/debug.py" in render_node
  71.             result = node.render(context)
File "/var/lib/python-support/python2.5/django/template/loader_tags.py" in render
  24.         result = self.nodelist.render(context)
File "/var/lib/python-support/python2.5/django/template/__init__.py" in render
  768.                 bits.append(self.render_node(node, context))
File "/var/lib/python-support/python2.5/django/template/debug.py" in render_node
  71.             result = node.render(context)
File "/var/lib/python-support/python2.5/django/template/defaulttags.py" in render
  245.                     return self.nodelist_true.render(context)
File "/var/lib/python-support/python2.5/django/template/__init__.py" in render
  768.                 bits.append(self.render_node(node, context))
File "/var/lib/python-support/python2.5/django/template/debug.py" in render_node
  71.             result = node.render(context)
File "/var/lib/python-support/python2.5/django/template/defaulttags.py" in render
  422.         output = self.nodelist.render(context)
File "/var/lib/python-support/python2.5/django/template/__init__.py" in render
  768.                 bits.append(self.render_node(node, context))
File "/var/lib/python-support/python2.5/django/template/debug.py" in render_node
  71.             result = node.render(context)
File "/var/lib/python-support/python2.5/django/template/defaulttags.py" in render
  422.         output = self.nodelist.render(context)
File "/var/lib/python-support/python2.5/django/template/__init__.py" in render
  768.                 bits.append(self.render_node(node, context))
File "/var/lib/python-support/python2.5/django/template/debug.py" in render_node
  81.             raise wrapped

Exception Type: TemplateSyntaxError at /ipdevinfo/pmj-swi541.pmj.gov/
Exception Value: Caught an exception while rendering: Reverse for 'nav.rrdviewer-rrd-by-ds-tf' with arguments '('', u'day')' and keyword arguments '{}' not found.

Original Traceback (most recent call last):
  File "/var/lib/python-support/python2.5/django/template/debug.py", line 71, in render_node
    result = node.render(context)
  File "/var/lib/python-support/python2.5/django/template/defaulttags.py", line 378, in render
    args=args, kwargs=kwargs)
  File "/var/lib/python-support/python2.5/django/core/urlresolvers.py", line 252, in reverse
    *args, **kwargs)))
  File "/var/lib/python-support/python2.5/django/core/urlresolvers.py", line 241, in reverse
    "arguments '%s' not found." % (lookup_view, args, kwargs))
NoReverseMatch: Reverse for 'nav.rrdviewer-rrd-by-ds-tf' with arguments '('', u'day')' and keyword arguments '{}' not found.