Silly me forgot to rename my foundations 2010 test server's machine name prior to installing SharePoint. I used STSAdmin to perform a server-rename after changing the machine name, but now local users are not appearing in the people picker any more. I.E. I cannot add local users into the site collection despite them having an account on the server.
The site, central admin, IIS, the content database are all housed on the same server. There's no replication concern here... Just need to "point" the people picker back to local users after the rename... Seems easy enough but I can't find the setting that needs to be changed.
EDIT - Plot thickens... If I simply enter a username into the permissions listing (I.E. don't even use the people picker) it resolves the user on the local machine... But when I try to search for them, they do not appear.