Cannot save layouts on Joomla 3.1.5

I duplicated my t3_blank template folder to create a custom template called "smith". I then discovered and installed this template in Joomla. Now, when I go to the layouts tab for "smith" in Joomla 3.1.5, I am unable to save any layout changes.

If I go into my original t3_blank template, I can save layouts just fine. What is going on? I duplicated the entire template folder and have made no other changes. I am running 1.4.1.

Thanks!