pyeth_error

(develop) jack@vent:~/src/pyethereum$ pyeth
INFO:app    starting    version='0.8.52_57_gf6f3b1a-py2.7.egg'
Traceback (most recent call last):
  File "/usr/local/bin/pyeth", line 9, in <module>
    load_entry_point('pyethereum==0.8.52-57-gf6f3b1a', 'console_scripts', 'pyeth')()
  File "/usr/local/lib/python2.7/dist-packages/pyethereum-0.8.52_57_gf6f3b1a-py2.7.egg/pyethereum/eth.py", line 133, in main
    config = create_config()
  File "/usr/local/lib/python2.7/dist-packages/pyethereum-0.8.52_57_gf6f3b1a-py2.7.egg/pyethereum/eth.py", line 125, in create_config
    konfig.validate_config(config)
  File "/usr/local/lib/python2.7/dist-packages/pyethereum-0.8.52_57_gf6f3b1a-py2.7.egg/pyethereum/config.py", line 103, in validate_config
    assert len(config.get('network', 'node_id')) == 128  # 512bit hex encoded
AssertionError