We're seeing blank Admin pages (menu and sidebar appear, bodies are blank) and the error log says
PHP Warning: Illegal offset type in /var/www/wp-content/plugins/w3-total-cache/lib/W3/Plugin/BrowserCache.php on line 313, referer: http://www.thorncoyle.com/wp-admin/
Disabling W3 Total cache fixes the admin page issue. We tried removing and reinstalling W3 Total Cache with the same results. Has anybody else seen this? Is it resolvable with W3TC 0.9.4?