When I choose to edit some of my site's pages, the screen opens but is completely blank; I mean the whole WordPress screen is blank, not just the text edit area for the page.
I suspected a plugin might be the cause as the error started sometime after the WordPress 3.6 upgrade, which was followed by multiple upgrades to multiple plugins. I activated the plugins one by one until the error occurred. It happened with Fast Secure Contact Form.
I'd appreciate any ideas of how to rectify this.