After converting a solution from 11 to 12 on a few of my tabs the main font colours for the tab headings changed for example from white to black. Using text colour or conditional formating for a condition that always exists does not change them to the colour I want. Any idea about controlling this and why it happens appreciated. The layout has no theme. If I apply a theme then change it back to no theme lots of other things change. Seems to occur on both Mac and PC.