I have 2 categories (didn't try more) where I had 1 post and I remove it... The 2 posts do not belong clearly to that categories (see in admin panel). The category count in admin panel show 0 count which is ok.
But when I put the list of category with post count in the sidebar, these 2 categories appear with 1 post!?
When I check in phpmyadmin, they have also 1 in category_count...
I have the impression that the db is not well updated....idea?