Why isn't New Blog Templates working?

Hi guys & gals,

I'm having trouble getting the New Blog Templates plugin to work. I followed the steps in the documentation, namely: (1) created a new multisite and created a template from it; (2) verified that the option to choose a theme appears on the signup page; (3) tested multiple times to make sure I wasn't crazy. When I sign up, I choose the template I created, but when the new site loads, it has the default Twenty Twelve theme enabled.

I've also ensured that the theme being used for the template site is network activated and that all sites have access to it.

Are you aware of any other users having trouble getting this plugin to work?