[iomari]

greetings,
i'm getting the following error when updating from 8.50 to 8.60:
what am I missing?

Installing bash completion to /etc/bash_completion.d/calibre
Traceback (most recent call last):
File "./setup.py", line 99, in <module>
sys.exit(main())
File "./setup.py", line 85, in main
command.run_all(opts)
File "/mnt/installs/home/Gbaye/work/calibre-0.8.60/setup/__init__.py", line 163, in run_all
self.run_cmd(self, opts)
File "/mnt/installs/home/Gbaye/work/calibre-0.8.60/setup/__init__.py", line 159, in run_cmd
cmd.run(opts)
File "/mnt/installs/home/Gbaye/work/calibre-0.8.60/setup/install.py", line 140, in run
self.run_postinstall()
File "/mnt/installs/home/Gbaye/work/calibre-0.8.60/setup/install.py", line 179, in run_postinstall
manifest=self.manifest)
File "/mnt/installs/home/Gbaye/work/calibre-0.8.60/src/calibre/linux.py", line 180, in __init__
self.setup_completion()
File "/mnt/installs/home/Gbaye/work/calibre-0.8.60/src/calibre/linux.py", line 257, in setup_completion
f.write(opts_and_words('fetch-ebook-metadata', fem_op, []))
File "/mnt/installs/home/Gbaye/work/calibre-0.8.60/src/calibre/linux.py", line 440, in opts_and_words
opts = '|'.join(options(op))
File "/mnt/installs/home/Gbaye/work/calibre-0.8.60/src/calibre/linux.py", line 429, in options
parser = option_parser()
File "/mnt/installs/home/Gbaye/work/calibre-0.8.60/src/calibre/ebooks/metadata/sources/cli.py", line 32, in option_parser
parser.add_option('-t', '--title', help='Book title')
File "/usr/lib/python2.7/optparse.py", line 1018, in add_option
raise TypeError, "invalid arguments"
TypeError: invalid argument