Added a blog post yesterday and after doing so the site's skin/background stopped rendering in Firefox and only in Firefox. Completely out of the blue, no issues prior.
I deactivated all plugins and turned them back on one by one, and the problem is with W3 Total Cache. What setting(s) could possibly be making the site render incorrectly in Firefox and only Firefox has me mystified: I've never seen this before when using W3 Total Cache on any other property. Any ideas?