We're making some upgrades behind the scenes today that'll allow us to bring some new, cool features to the site that we think you'll like. Beginning this morning at 5:00 a.m. ET, all community features will be disabled (commenting, favoriting, and new submissions to Talk and Photograzing). We expect the upgrade to take approximately 3 hours and as soon as it is complete, community features will be restored. Thanks for your patience!
UPDATE:: Upgrade was completed as of ~8:00 a.m. ET. Thanks!