cannot remove all categories from a post
|Reported by:||Denis-de-Bernardy||Owned by:||anonymous|
When a post has any number of categories, you cannot deselect them all. If you do so, WP ignores the category update altogether and sticks with the old set of categories.
This might arguably be on purpose, but if so it's a bit odd in that in the last version of WP a post could have no categories.