I'm working in a drawing using a dimstyle that has architectural tic marks at the end off the dimension lines. Until now those tic marks have been solid - now they are just an outline.

Apparently I've done something inadvertently to cause this to happen. I've checked that fillmode is set to 1. I've purged the drawing, saved it closed it and reopened it, I've restarted autocad, without results. I've opened other drawings and the tic mark is filled.

Does anyone know what is happening here?