Why my theme suddenly gone blue after an update? After updating the Bartik 960 template on Drupal the homepage highlight each of the blocks on the page in blue. It looks like it's gone into a debugging mode, but I'm not sure how to fix it.
Check the css with your browser's inspector and see what elements are surrounding this behavior.  Is this occurring for all users (admin to anonymous)?

Does this happen in all regions or just the "highlight" region?