very weird. @aaronpk reported that bridgy sent him duplicate responses this morning, e.g. on http://aaronparecki.com/notes/2014/09/02/4/drhorrible. here are example original and duplicated u-urls:

• https://facebook.com/11500459/posts/10101595978024156?comment_id=10101596203522256
• https://facebook.com/11500459/posts/11500459:10101595978024156:63?comment_id=10101596203522256

note the odd (bad) colon-formatted post id in the dupe. FB evidently returned comment ids like these in a single /me/posts API call, 2014-10-28 16:53:24 UTC. log here. polls for @aaronpk's acccount since then have received normal comment ids, without colons.