Never mind. I made a new subdomain and hosted Comicpress there. Working great! You can take a look at http://webcomics.scientiaweb.com
Just here to thank e3mobile for the awesome fix. Many thanks!
Oh thanks!
Turns out it was the “All-in-One SEO” plugin I disabled some time before. Activating it fixed the problem and disabling and re-enabling the new SEO plugin fixed it as well. Thanks!
Actually, this has nothing to do with the theme, I think. Even after I installed the theme a month ago, everything was fine! Until yesterday when it messed it up itself.