I've recently started having problems with the title placemarker feature, where the one of the placemarkers shows literally as '%%sitename%%' in the title bar.
The problem only appears to be for category titles.
The first placemarker for category titles, %%category%%, displays correctly in the title bar. The second placemarker, %%sitename%%, is the one that displays literally.
This only appears to happen on parent categories. Child categories are fine.