I just created a new site using an old theme. I kept the theme the same but changed the name of the template (because I will be modifying it on the new site). I also made sure the reference to the CSS URL was correct in the renamed-directory theme. What else do I have to change?
It seems that the site is not reading the CSS file of the renamed-directory theme, even though the CSS is where it is supposed to be and it is referenced properly in the head of the html document.
The site works fine with the default template, and with the original template with the old name.
This is the site (I may have switched to the original template):
This is the site where the template is being used successfully: