Not sure if this is of my making due to my customisations, or a bug introduced recently.  I suspect a bug.

Therion 5.5.5 and 5.5.4+4e3623 produce map headers without explorers, surveyors, cartographers or copyrights.

Without making any change other than installing 5.5.4+647dcea the explorers, surveyors, cartographers and copyrights are correctly exported.

Bruce