Traceback (most recent call last):
  File "/usr/bin/ubiquity-dm", line 271, in <module>
    ret = dm.run(*sys.argv[4:])
  File "/usr/bin/ubiquity-dm", line 75, in run
    os.makedirs('/var/log/installer')
  File "/usr/lib/python2.6/os.py", line 157, in makedirs
    mkdir(name, mode)
OSError: [Errno 17] File exists: '/var/log/installer'