I've been developing a site and it is nearing completion.
I recently uninstalled Optimizer, only to find the_content() no longer returns anything - just blank.
Even on pages with no shortcodes whatsoever. the_title() remains fine.
Upon re-activating Optimizer, everything works again.
I've now deactivated and deleted both NextGen Gallery (and 'uninstalled', after deleting all my galleries) and NGG Optimizer, and the problem persists. I install Optimizer again without NGG, and the_content() is working again.
Before installing Optimizer everything was fine and running well.
I've already spent hours and hours trying to figure out the problem, and now I'm afraid I'll have to rebuild the site back-end entirely (lots of work with Pods CMS and others...)
This is all running on my local server at the moment.