[gweminence]

Okay, here's the first run, which worked fine -- as I expected it to, since I'd just opened calibre after installing your newest update. I'll post this json file. Then I'll add some books and run another batch, to show the problem:

Spoiler:

calibre, version 0.8.0
Kindle Collections: <P>Collections saved to the Kindle.<P>
13 collections, 17 books found on the Kindle.<P><P>Eject and Restart the Kindle to load your changes.<P>


=== Kindle Collections Report


Collections saved to the Kindle:

Collection Managed By Books Change
---------- ---------- ----- ------
Action Calibre 2 Replaced (from column "Tags")
Fantasy Calibre 5 Replaced (from column "Tags")
Gor Calibre 1 Replaced (from column "Tags")
Historical Calibre 2 Replaced (from column "Tags")
Horror Calibre 1 Replaced (from column "Tags")
Mystery Calibre 1 Replaced (from column "Tags")
Paranormal Calibre 2 Replaced (from column "Tags")
Retail Calibre 2 Replaced (from column "Tags")
Romance Calibre 1 Replaced (from column "Tags")
Science Fiction Calibre 5 Replaced (from column "Tags")
Series Not Complete Calibre 1 Replaced (from column "Tags")
Suspense Calibre 2 Replaced (from column "Tags")
Thriller Calibre 4 Replaced (from column "Tags")

No collections selected to delete from the Kindle.



=== Settings:

Tags
Action: Create
Prefix: ""
Suffix: ""
Minimum: ""
Ignore: ""
Include: ""
Rename from: ""
Rename to: ""
Split on: ""

Never delete/modify these Kindle collections:
Action when toolbar icon is clicked: Show menu (default)
Preserve existing Kindle-only collections: True
Ignore prefix/suffix when comparing Calibre names: True
Ignore case when pattern matching: True
Calibre Personal doc tag: ""
Kindle collections file: I:\system\collections.json
Plugin customization file: C:\Users\Greg\AppData\Roaming\calibre\plugins\Kind le Collections.json
System Encoding: mbcs

Run View Report to see collection and book details.

Edit:

Ah, I leave calibre running 24/7, usually, for webservice. So it's usually running when plugging the Kindle in.