update of arxiv entry gives python error

[foice]

Hello,
I have just installed the python script ads_bibdesk and it works very well to import new papers and to preview them.

Unfortunately it gives me troubles when I want to update a previously added paper.

~>adsbibdesk --update_arxiv 1203.4821
Starting ADS to BibDesk
Traceback (most recent call last):
File "/usr/local/bin/adsbibdesk", line 9, in <module>
load_entry_point('adsbibdesk==3.2.0', 'console_scripts', 'adsbibdesk')()
File "build/bdist.macosx-10.11-intel/egg/adsbibdesk.py", line 187, in main
File "build/bdist.macosx-10.11-intel/egg/adsbibdesk.py", line 494, in update_arxiv
File "build/bdist.macosx-10.11-intel/egg/adsbibdesk.py", line 458, in b2d
AttributeError: 'NoneType' object has no attribute 'group'

what could it be?

I am using Python 2.7.10, in case it matters.