[mikerbates]

3.39.1 works just fine but when I upgraded to 3.40 Calibre starts to load but then crashes. Here's the dump from debug -g:

calibre 3.40 [64bit] embedded-python: True is64bit: True
Windows-10-10.0.17763-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.17763')
Python 2.7.15+
Windows: ('10', '10.0.17763', 'SP0', u'Multiprocessor Free')
Interface language: None
Successfully initialized third party plugins: Count Pages (1, 8, 2) && Goodreads Sync (1, 12, 1) && Extract ISBN (1, 4, 4) && View Manager (1, 4, 3) && Goodreads (1, 4, 0)
Turning on automatic hidpi scaling
devicePixelRatio: 2.0
logicalDpi: 96.0 x 96.0
physicalDpi: 141.76744186 x 141.402061856
Using calibre Qt style: True
[0.00] Starting up...
[0.00] Showing splash screen...
[0.08] splash screen shown
[0.08] Initializing db...
[0.14] db initialized
[0.14] Constructing main UI...
DEBUG: 0.0 HttpHelper::__init__: proxy=None
[1.84] main UI initialized...
[1.84] Hiding splash screen
Traceback (most recent call last):
File "site-packages\calibre\gui2\library\delegates.py", line 447, in displayText
File "site-packages\calibre\utils\date.py", line 358, in format_date
AttributeError: 'builtin_function_or_method' object has no attribute 'lower'

I've gone back to 3.39.1 for now

Thanks,
Mike