While almost impossible to comprehend, the Curiously Green theme had a minor bug in the code behind that was pointed out on the BlogEngine.NET Issue Tracker today.
I've updated the theme and have the new version available here on my site as well on the main BlogEngine.NET Themes repository.
If you happen to be using that theme, please be sure to get the update.
Download BlogEngine.NET Theme: Curiously Green 1.01