Mod_python error: "PythonHandler django.core.handlers.modpython"

Traceback (most recent call last):

  File "/usr/lib/python2.4/site-packages/mod_python/apache.py", line 299, in HandlerDispatch
    result = object(req)

  File "/usr/lib/python2.4/site-packages/django/core/handlers/modpython.py", line 188, in handler
    return ModPythonHandler()(req)

  File "/usr/lib/python2.4/site-packages/django/core/handlers/modpython.py", line 161, in __call__
    response = self.get_response(request)

  File "/usr/lib/python2.4/site-packages/django/core/handlers/base.py", line 64, in get_response
    response = middleware_method(request)

  File "/usr/lib/python2.4/site-packages/django/middleware/cache.py", line 59, in process_request
    cache_key = get_cache_key(request, self.key_prefix)

  File "/usr/lib/python2.4/site-packages/django/utils/cache.py", line 163, in get_cache_key
    headerlist = cache.get(cache_key, None)

  File "/usr/lib/python2.4/site-packages/django/core/cache/backends/memcached.py", line 23, in get
    val = self._cache.get(smart_str(key))

  File "/usr/lib/python2.4/site-packages/memcache.py", line 342, in get
    check_key(key)

  File "/usr/lib/python2.4/site-packages/memcache.py", line 577, in check_key
    raise Client.MemcachedKeyLengthError, "Key length is > %s" % SERVER_MAX_KEY_LENGTH

MemcachedKeyLengthError: Key length is > 250