I didn't see anything about this,
I have an existing single user worpress site, which I would like to convert to multiuser.
When I try to do so, it tells me that since it is existing, I can only convert to subdomain, not subdirectory,
and that existing permalinks for the main site might be corrupted.
It is a fairly new site, so I don't have any comments I need to preserve, and would not be adverse to starting it over, I'm just not sure how to go about it.
So what do I have to do to get my main site moved to a subdirectory, and set up WPMU as a subdirectory installation?