Restricted Driver Manager does not display fglrx after installation

After enabling the fglrx driver through the restricted driver manager (RDM) on Hardy Alpha 5 and rebooting, the fglrx driver disappears from the RDM. Even after disabling the driver manually in xorg and removing the fglrx package, the RDM still does not list the driver.

Running the RDM manually results in this traceback:

ERROR: Could not instantiate Handler subclass __builtin__.FglrxDriver from name FglrxDriver
Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/jockey/detection.py", line 379, in get_handlers
    inst = obj(ui)
  File "/usr/share/jockey/handlers/fglrx.py", line 15, in __init__
    rationale=ui._('This driver is required to fully utilise '
  File "/usr/lib/python2.5/site-packages/jockey/xorg_driver.py", line 51, in __init__
    description, rationale)
  File "/usr/lib/python2.5/site-packages/jockey/handlers.py", line 601, in __init__
    rationale)
  File "/usr/lib/python2.5/site-packages/jockey/handlers.py", line 291, in __init__
    assert self._modinfo, 'kernel module %s exists' % self.module
AssertionError: kernel module fglrx exists
WARNING: modinfo for module nvidia_new failed: modinfo: could not find module nvidia_new

ERROR: Could not instantiate Handler subclass __builtin__.NewNvidiaDriver from name NewNvidiaDriver
Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/jockey/detection.py", line 379, in get_handlers
    inst = obj(ui)
  File "/usr/share/jockey/handlers/nvidia.py", line 49, in __init__
    NvidiaDriver.__init__(self, ui, 'nvidia_new', 'nvidia-glx-new')
  File "/usr/share/jockey/handlers/nvidia.py", line 18, in __init__
    rationale=ui._('This driver is required to fully utilise '
  File "/usr/lib/python2.5/site-packages/jockey/xorg_driver.py", line 51, in __init__
    description, rationale)
  File "/usr/lib/python2.5/site-packages/jockey/handlers.py", line 601, in __init__
    rationale)
  File "/usr/lib/python2.5/site-packages/jockey/handlers.py", line 291, in __init__
    assert self._modinfo, 'kernel module %s exists' % self.module
AssertionError: kernel module nvidia_new exists
WARNING: modinfo for module nvidia failed: modinfo: could not find module nvidia

ERROR: Could not instantiate Handler subclass __builtin__.NvidiaDriver from name NvidiaDriver
Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/jockey/detection.py", line 379, in get_handlers
    inst = obj(ui)
  File "/usr/share/jockey/handlers/nvidia.py", line 18, in __init__
    rationale=ui._('This driver is required to fully utilise '
  File "/usr/lib/python2.5/site-packages/jockey/xorg_driver.py", line 51, in __init__
    description, rationale)
  File "/usr/lib/python2.5/site-packages/jockey/handlers.py", line 601, in __init__
    rationale)
  File "/usr/lib/python2.5/site-packages/jockey/handlers.py", line 291, in __init__
    assert self._modinfo, 'kernel module %s exists' % self.module
AssertionError: kernel module nvidia exists
WARNING: modinfo for module nvidia_legacy failed: modinfo: could not find module nvidia_legacy

ERROR: Could not instantiate Handler subclass __builtin__.LegacyNvidiaDriver from name LegacyNvidiaDriver
Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/jockey/detection.py", line 379, in get_handlers
    inst = obj(ui)
  File "/usr/share/jockey/handlers/nvidia.py", line 42, in __init__
    'NoLogo': 'True'})
  File "/usr/share/jockey/handlers/nvidia.py", line 18, in __init__
    rationale=ui._('This driver is required to fully utilise '
  File "/usr/lib/python2.5/site-packages/jockey/xorg_driver.py", line 51, in __init__
    description, rationale)
  File "/usr/lib/python2.5/site-packages/jockey/handlers.py", line 601, in __init__
    rationale)
  File "/usr/lib/python2.5/site-packages/jockey/handlers.py", line 291, in __init__
    assert self._modinfo, 'kernel module %s exists' % self.module
AssertionError: kernel module nvidia_legacy exists