Yesterday, I created a brand new WP install in a sub-directory on a domain. I deleted that installation, created a brand new one at the root directory, and used the previous installation's database. I also went into phpMyAdmin and changed the database entries for the site URL, according to this page: http://codex.wordpress.org/Changing_The_Site_URL so it would no longer be associated with the sub-directory (at least I hoped so).
Today, I started to set up Multisite, and would like to use a sub-directory structure instead of a sub-domain structure. But I'm getting this restriction:
I know that this happens for installations more than a month old, but mine is only a day old. I'd rather not have to re-configure the network setup after the fact, so is there an easy way for me to fix this so I can do it right from the beginning? Is there another entry in the database that I missed which is preventing me from doing this?