I have a single site on a fresh install. However, in the top right corner, clicking on the site name gives the dropdown as if this were a multi site install. I am not running MSM.
Additionally, it wasn't clear where to edit the site name, I had to do so in the DB.
Bug?
Well, I feel dumb. For some unknown reason, I had this setting in config.php:
$config['multiple_sites_enabled'] = "y";
Changed to "n" and now things work as expected.
Palm to forehead.
You should be able to edit the site name within the CP under Admin > General Configuration > Site Name.
"Additionally, it wasn't clear where to edit the site name, I had to do so in the DB."
Might you have inadvertently created a new site entry within the exp_sites table when you entered your site name? How many sites do you see when you look at that table?
Try looking inside the system folder if there is this file: system > expressionengine > controllers > cp > sites.php
if it is there, try to delete it
