I've been trying to install a custom theme in a brand-new c5 installation. Following the instructions on the c5 site, I've created a folder in root/themes and put all my theme files there. When I go to Page and Themes, no themes aside from the three stock themes are available. Thinking I might have done something wrong creating the theme, I tried downloading a free c5 theme, but that doesn't show up either. As a final test, I tried copying a stock theme from root/concrete/themes to root/themes (using a different name) and that one doesn't show up either.

Looking under Sitewide Settings under the Debug tab, I noticed that all three of my theme attempts show up under a #concrete5 Overrides. That seems to indicate that something is seeing them, but they never show up as an available option to install. To be clear, all three of these are bare themes and are not packages.

I've been browsing the forums and several other people have reported this same issue, but there was either no solution or the posted solution didn't make a difference. I have verified that the theme folder name isn't duplicated in the path. I've disabled all site caching to make sure that nothing is hung up there. I've verified permissions on the folders themselves, so the web server user has permissions to read the directories.

Is there anything else I can try? I'm running out of ideas to get these themes to show up. Thanks for any help!