After 2.5.3 theme update
Select header type for Taxonomies from Theme Options -> General –> Header you must make sure Media Header Type for Taxonomy?
Any header different than Google Maps will require using a Standard list template for Taxonomy pages.
This is managed in Theme Options – Appearance – the option for Property List Type for Taxonomy pages must be set to Standard:
From Theme Options-General-Header disable the option to set the uploaded image as header