User blog comment:DaNASCAT/Technical Update: October 24, 2016/@comment-4970747-20161024220836/@comment-5973717-20161025012600

Are you doing something odd, like making a DPL-generated gallery? If so, read this: http://semeb.com/dpldemo/DPL:Manual_-_General_Usage_and_Invocation_Syntax#Characters_with_special_meaning.

If you need to use pipe characters as a literal, rather than a grammatical marker, use |.