Drupal Pager Error Causing WSOD When Viewing Term or Edit Term
If you ever run into a WSOD error, follow the directions here and it will generally tell you the file name and the line number that is causing the WSOD. Or, it will tell you that your server resources are too limited (out of memory). 

Here are the instructions:

http://drupal.org/node/158043

Or just Google 'Drupal WSOD' and it's the first link on the SERP.