I just noticed a problem with the sample code. Unfortunately I don’t know anything about JavaScript so I can’t fix it.
The problem condition: *if* a category name is alphabetically sorted below the category “uncategorized” (for example, Washington DC is after Uncategorized), *then* the bulk delete function will not remove the “uncategorized” category from the posts.
I’m running wordpress-MU 2.9.1 (for the time being). 2.9.2 is now out.