Yes, I did disable the Photon feature because I would get the follwoing code at the beginning of each excerpt:
Warning: array_key_exists() [function.array-key-exists]: The first argument should be either a string or an integer in /home/content/35/7582135/html/wp-content/plugins/jetpack/modules/photon.php on line 224
Everything is up to date on my site, and it occurred even with all other plugins disabled