I'm in the middle of doing a large import from a CS7 board for a client into vB3.8.4, but when I do import users, I get the following:

Importing 100 Users

From : 0 :: To : 100


username
username
username
username
username
username
...
When the import finishes, there's nothing new and all posts appear as guest posts.

It also takes a ridiculously long time to do the import, 78 minutes vs. a rather quick thread and post import (with a good 19,000 posts, surely it should be longer than the user module?).

Anyone care to suggest what the hell may be going on?