Really strange thing happened:
The white screen of death came onto one of our Wordpress sites. The screen only shows on category pages. Here's a sample: http://momprepares.com/category/preparedness/
Here's what I've tried to fix the problem:
I can't think of anything that's been changed aside from some minor stylings in the style.css file. Also, we made a custom widget and added that to the functions.php file.
I also tried disabling the widget in functions.php and the problem persists. Any help would be really appreciated.
Solved the problem. We're using a Genesis theme and it was lacking a category.php file in it. Added a category.php file with the code and it worked out.