Last modified: 2010-05-15 15:38:12 UTC
Both a new install and an upgrade of 1.4 HEAD result in an empty user_groups table. The only user in both cases is the default WikiSysop. The user_rights row has only "read,edit,move,upload" rights for a new install. From memory, the user_rights row from an upgrade had only "sysop,bureaucrat" rights.
I had the same problem in 1.4b3: I first selected a Creative Commons license, and noticed the warning that says that all form entries will be lost after the license selection. When I got back from the CC website I filled in the form in the config script and didn't change the default sysop name. In the end, when I checked manually in mysql the user table was completely empty and no sysop had been created. Here's a wild guess: could it be that the sysop field got reset during the CC excursion? Or is this because I didn't change the default sysop name?
1.4 doesn't have a user_groups table currently. When you do the CC outing it clears all other fields in the install form.
1.5 on install now populates user_groups for the newly created sysop.