This was in the themeparselog if it helps anything.
rror : File - ('Civ4Theme_Custom.thm', Ln:4910, Col:47) Could not load bitmap 'Civ4/HUD/city_titlearrows.tga'
Error : File - ('Civ4Theme_Custom.thm', Ln:4918, Col:47) Could not load bitmap 'Civ4/HUD/city_titlearrows.tga'
Error : File...