Thanks Jeremy. Yes pages are displaying properly now after I added this code to functions.php:
add_filter( 'jetpack_enable_opengraph', '__return_false', 99 );
Basically, disabling OPen Graph. When viewing the source code of blank pages, I saw that code stopped loading at the first instance of Open Graph in the header. This seems to fix it.
But is this the best solution?
Thanks to @yoast for the insight (here: http://yoast.com/jetpack-and-wordpress-seo/)