General conversion options no more working in Windows 10 and Ubutuntu 17.04 with kde

[ps67]

in Windows 10

calibre, version 3.9.0
ERRORE: Eccezione non gestita: <b>AttributeError</b>:'OptionRecommendation' object has no attribute 'expandtabs'

calibre 3.9 [64bit] embedded-python: True is64bit: True
Windows-10-10.0.15063-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.15063')
Python 2.7.12+
Windows: ('10', '10.0.15063', 'SP0', u'Multiprocessor Free')
Interface language: it
Successfully initialized third party plugins: DeDRM (6, 5, 3) && EpubMerge (2, 1, 1) && Wiki Reader (2, 1, 0) && KFX Output (1, 10, 0) && Hyphenate This! (0, 0, 8)
Traceback (most recent call last):
File "site-packages\calibre\gui2\preferences\main.py", line 308, in show_plugin
File "site-packages\calibre\gui2\preferences\conversion.py", line 98, in genesis
File "site-packages\calibre\gui2\preferences\conversion.py", line 95, in widget_factory
File "site-packages\calibre\gui2\convert\look_and_feel.py", line 55, in __init__
File "site-packages\calibre\gui2\convert\__init__.py", line 94, in initialize_options
File "site-packages\calibre\gui2\convert\__init__.py", line 268, in setup_help
File "site-packages\calibre\gui2\convert\__init__.py", line 272, in setup_widget_help
File "textwrap.py", line 325, in wrap
File "textwrap.py", line 154, in _munge_whitespace
AttributeError: 'OptionRecommendation' object has no attribute 'expandtabs'

and in Ubuntu 17.04 with kde I have the same message:

calibre, version 3.9.0
ERRORE: Eccezione non gestita: <b>AttributeError</b>:'OptionRecommendation' object has no attribute 'expandtabs'

calibre 3.9 embedded-python: True is64bit: True
Linux-4.10.0-37-generic-x86_64-with-debian-stretch-sid Linux ('64bit', 'ELF')
('Linux', '4.10.0-37-generic', '#41-Ubuntu SMP Fri Oct 6 20:20:37 UTC 2017')
Python 2.7.12
Linux: ('debian', 'stretch/sid', '')
Interface language: it
Successfully initialized third party plugins: DeDRM (6, 5, 3) && EpubCheck (0, 1, 2) && Wiki Reader (2, 1, 0) && EpubMerge (2, 1, 1) && Hyphenate This! (0, 0, 8)
Traceback (most recent call last):
File "site-packages/calibre/gui2/preferences/main.py", line 308, in show_plugin
File "site-packages/calibre/gui2/preferences/conversion.py", line 98, in genesis
File "site-packages/calibre/gui2/preferences/conversion.py", line 95, in widget_factory
File "site-packages/calibre/gui2/convert/look_and_feel.py", line 55, in __init__
File "site-packages/calibre/gui2/convert/__init__.py", line 94, in initialize_options
File "site-packages/calibre/gui2/convert/__init__.py", line 268, in setup_help
File "site-packages/calibre/gui2/convert/__init__.py", line 272, in setup_widget_help
File "textwrap.py", line 325, in wrap
File "textwrap.py", line 154, in _munge_whitespace
AttributeError: 'OptionRecommendation' object has no attribute 'expandtabs'

[ps67]

Sorry, after the post I have seen that someone else had posted about same problem

[JSWolf]

It's a typo in 3.9 and will be fixed in the next release.