This evening, I was introduced to the Drupal phenomenon referred to as the "white screen of death". And I panicked...
While enabling some new modules I uploaded to my web site, I was suddenly confronted with a completely blank white screen when I clicked on the Save Configuration button. I tried reverting back to different file paths, both on the admin interface and the public one, with no luck, even after clearing the cache and trying different browsers.
First thing that came to mind was the my database had been corrupted, but when I accessed the MySQL tables, all seemed fine.
It just figures that after a couple days reading through my Ruby on Rails book, I finally get to sit down and start building the Digg-like Shovell project from the book, only to get error after error when trying to build my domain models and .yml files. So I switched to a couple web tutorials for beginners only to run into the same error. After Googling the exact error, I found others who recently encountered this same error, which turns out to be a result of trying out Rails v.1x tutorials on newer v.2.0 installations (version 2.0 was released December 2007).