[OneMore]

Feedback.
I uploaded a bunch of books to a virgin new unregistered Kindle (v.3) and created collections using Calibre 0.7.55 and latest plug-in basing on FB2 categories.
All options were left default.
The books were sequentially converted earlier, using Calibre versions from 0.7.51 to 0.7.53.
After Kindle rebooted, everything looked OK, but - after I converted and added some more books to one collection, they appeared at Kindle, but did not get into collection. The FB2 tags in the source books were the same as other books uploaded earlier.
When I tried to re-create the Kindle collection using the same method, I got the following message:

calibre, version 0.7.55
ERROR: Unhandled exception: <b>TypeError</b>:delete_quiet() got an unexpected keyword argument 'kindle_managed'

Traceback (most recent call last):
File "calibre_plugins.kindle_collections.ui", line 83, in create_kindle_collections
File "calibre_plugins.kindle_collections.create_preview ", line 56, in create_kindle_collections_main
File "calibre_plugins.kindle_collections.create_preview ", line 127, in process_calibre_collections
File "calibre_plugins.kindle_collections.create_preview ", line 308, in convert_calibre_collections_to_kindle
TypeError: delete_quiet() got an unexpected keyword argument 'kindle_managed'

Tried twice with the same result, restarting Kindle and OS each time.

extra info:
* system is XP SP3, 1Gb RAM
* Kindle Version is 3.0.2 (529960105)
* option to "trigger fast hack reboot..." does not seem to have any effect on this Kindle. It takes about 3 to 5 minutes to reboot in any case.
* "kindle category" column is empty
* when I remove some books from Kindle using Calibre, there are orphaned records in category (title: book with no file - #[GUID]^EBOK, other fields empty). They can be seen in "edit kindle collections manually" dialog window.
* these orphan books do not disappear even after I re-create the collection automatically (i.e. overriding Kindle collection).

after I imported these Kindle collections to Calibre, the folowing message is displayed attempting to re-create Kindle collections from Calibre:

calibre, version 0.7.55
ERROR: Unhandled exception: <b>KeyError</b>:u'#importedkindlecollections'

Traceback (most recent call last):
File "calibre_plugins.kindle_collections.ui", line 83, in create_kindle_collections
File "calibre_plugins.kindle_collections.create_preview ", line 56, in create_kindle_collections_main
File "calibre_plugins.kindle_collections.create_preview ", line 125, in process_calibre_collections
File "calibre_plugins.kindle_collections.create_preview ", line 141, in filter_collections
KeyError: u'#importedkindlecollections'


meme - Let me know if you are interested to check it deeper as a possible bug.