For those who may have had a sudden white screen of doom, this may have been caused by the often buggy new version of YOAST SEO.
They have issued a PATCH today (July 22). If you updated this week, you will want to get the new version out today.
(HINT! never update YOAST to their new version the day it comes out; wait a day for inevitable patches so their fu*k ups don’t crash your site!)
REF:
2.3.1
Release Date: July 22nd, 2015
•Bugfixes: •Makes sure authors and editors cannot submit advanced metadata on a post when the advanced tab in the metabox has been disabled for them. Thanks Peter Allor from IBM for finding and reporting this issue.
•Fixes a bug where upgrading to version 2.3 would occasionally cause WSOD’s on both admin and frontend. We were unable to pinpoint the exact conflicting plugins and themes, but we are quite confident it was caused by us using, and others hooking into, WP_Query too early.
