We're having some trouble with one site following the latest release of W3TC.
At the moment we're getting this error for normal visitors:
Fatal error: Call to undefined function wp() in /home/account/public_html/wp-blog-header.php on line 14
And this error for Dashboard:
Fatal error: Call to undefined function nocache_headers() in /home/account/public_html/wp-admin/admin.php on line 32
We have tried disabling all plug-ins via phpMyAdmin by clearing out the array in the options table. That didn't work, but perhaps revealingly phpMyAdmin reported the action as having done work on '[option_name: ACTIVE_PLUGINS - _TRANSIENT_W3TC_REWRITE_TEST_D8C5182AD898453E]'.
We performed the update on a number of similar sites without any trouble, and it's hard to say why this one would be any different. Any advice on how to get the site and Dashboard up and running would be very welcome