[solitaire]

V0.6.90
1. Opened Preferences
2. Added custom fields (all text)
3. Rearranged fields
4. Restarted Calibre

All working well

5. Opened Preferences
6. Added one Boolean field, one date field and one integer field
7. Unticked builtin fields Publisher and Tags
8. Restarted Calibre
9. Tried to open Preferences
10. Git an ERROR: KeyError:u'publisher'

Details:
ERROR: ERROR: Unhandled exception: <b>KeyError</b>:u'publisher'

Traceback (most recent call last):
File "site-packages\calibre\gui2\ui.py", line 2225, in do_config
File "site-packages\calibre\gui2\dialogs\config\__init__.py", line 373, in __init__
KeyError: u'publisher'


Updating to 0.6.91.
Edit01: Problem fixed by doing this update.