[Noughty]

I get this error message then trying to edit column Pages (floating point numbers):

calibre, version 0.8.4
ERROR: Unhandled exception: <b>TypeError</b>:QDoubleSpinBox.setValue(float): argument 1 has unexpected type 'NoneType'

Traceback (most recent call last):
File "site-packages\calibre\gui2\library\delegates.py", line 291, in setEditorData
TypeError: QDoubleSpinBox.setValue(float): argument 1 has unexpected type 'NoneType'

I made another column for pages (integral) and I still get error message:
calibre, version 0.8.4
ERROR: Unhandled exception: <b>TypeError</b>:QSpinBox.setValue(int): argument 1 has unexpected type 'NoneType'

Traceback (most recent call last):
File "site-packages\calibre\gui2\library\delegates.py", line 291, in setEditorData
TypeError: QSpinBox.setValue(int): argument 1 has unexpected type 'NoneType'


This happens when column is empty and I want to add value to it (not in metadata edit window). I can add value fine, but I always get the error message. Unless there already was a value and I am changing it.

In debug mode:
calibre Debug log
calibre 0.8.4
Windows-Vista-6.0.6002-SP2
Windows
('Windows', 'Vista', '6.0.6002')
Python 2.7.1
Windows: ('Vista', '6.0.6002', 'SP2', 'Multiprocessor Free')
Failed to initialize plugin: u'C:\\Users\\Laura\\AppData\\Roaming\\calibre\\plu gins\\Goodreads Metadata.zip'
Traceback (most recent call last):
File "site-packages\calibre\customize\ui.py", line 501, in initialize_plugins
File "site-packages\calibre\customize\ui.py", line 54, in load_plugin
File "site-packages\calibre\customize\zipplugin.py", line 169, in load
File "importlib\__init__.py", line 37, in import_module
File "site-packages\calibre\customize\zipplugin.py", line 150, in load_module
File "calibre_plugins.dummy1.__init__", line 15, in <module>
ImportError: No module named fetch
Failed to initialize plugin: u'C:\\Users\\Laura\\AppData\\Roaming\\calibre\\plu gins\\Goodreads Covers.zip'
Traceback (most recent call last):
File "site-packages\calibre\customize\ui.py", line 501, in initialize_plugins
File "site-packages\calibre\customize\ui.py", line 54, in load_plugin
File "site-packages\calibre\customize\zipplugin.py", line 167, in load
File "site-packages\calibre\customize\zipplugin.py", line 150, in load_module
File "calibre_plugins.dummy1.__init__", line 16, in <module>
ImportError: No module named covers
Starting up...
Started up in 74.1159999371
Worker Launch took: 1.42100000381
Worker Launch took: 0.779000043869
Traceback (most recent call last):
File "site-packages\calibre\gui2\library\delegates.py", line 291, in setEditorData
TypeError: QDoubleSpinBox.setValue(float): argument 1 has unexpected type 'NoneType'

Traceback (most recent call last):
File "site-packages\calibre\gui2\library\delegates.py", line 291, in setEditorData
TypeError: QDoubleSpinBox.setValue(float): argument 1 has unexpected type 'NoneType'