Well, I found out the what, but not the why – another administrator had put Word and PowerPoint attachments to email tickets, and when he elevated their priority, OTRS stopped working. After deleting the attachments out of the database, OTRS began working again. I did notice they were the only records in the article_attachment table in the OTRS MySQL database that had a descriptor of “application/msword” or “application/powerpoint”. I highly recommend phpMyAdmin for routine MySQL database cleanup tasks:

 

http://www.phpmyadmin.net

 

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