Yelp needs to invalidate all YelpPages if the theme changes
Submitted by Brent Smith (smitten)
As the rendering for some documents is dependent on the current theme, all YelpPage's need to be invalidated when the theme has changed. I believe there is code to update all the $yelp.color.* settings when the theme changes, but YelpPages are cached and therefore do not get updated when the theme changes.