exception in twistd.log from web parser

[zooko]

Unfortunately I don't know what URL I sent to it. I didn't deliberately edit the URL, but I could've done so accidentally.

2012-06-13 01:55:07-0300 [HTTPChannel,5,127.0.0.1] Unhandled Error
        Traceback (most recent call last):
          File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line 298, in addCallback
            callbackKeywords=kw)
          File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line 287, in addCallbacks
            self._runCallbacks()
          File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line 545, in _runCallbacks
            current.result = callback(current.result, *args, **kw)
          File "/home/zooko/playground/tahoe-lafs/test/cloud-branch/support/lib/python2.7/site-packages/Nevow-0.10.0-py2.7.egg/nevow/appserver.py", line 307, in handleSegment
            res.locateChild, ctx, path
        --- <exception caught here> ---
          File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line 134, in maybeDeferred
            result = f(*args, **kw)
          File "/home/zooko/playground/tahoe-lafs/test/cloud-branch/support/lib/python2.7/site-packages/Nevow-0.10.0-py2.7.egg/nevow/rend.py", line 491, in locateChild
            r = self.childFactory(ctx, segments[0])
          File "/home/zooko/playground/tahoe-lafs/test/cloud-branch/src/allmydata/web/status.py", line 1170, in childFactory
            count = int(count_s)
        exceptions.ValueError: invalid literal for int() with base 10: '0.json'