A minister of Singapore (Vivian Balakrishnan) was found to be in breach of electioneering rules, when several posts were made on his Facebook account on "cooling-off day" (September 10th, 2015, the day before the elections).
He blamed this on a Facebook bug. Story.
Is this plausible? Have there been other known instances of this bug occurring? Or was this Singaporean politician victim to an exceedingly-rare bug? I am a casual Facebook user and not a security expert, but I have never heard of Facebook itself making the mistake of auto-posting to someone's page. (Although I've heard of rogue apps/games doing so.)
Update: According to Channel News Asia:
Facebook has confirmed that a bug in their system led to "recurrent auto-posting" on Dr Vivian Balakrishnan's Facebook page., causing a post to go up on Cooling-Off Day, when candidates are not allowed to campaign offline, or online.
In an email to the media on Friday (Sep 11) a spokesperson for Facebook said, "A bug in our technical system led to recurrent auto-posting on Dr Vivian Balakrishnan's Facebook Page. We are sorry for the inconvenience caused."
Note though that the above news outlet is wholly owned by the Singapore government. I can find no official statement from Facebook.