Facebook API: Message contains banned content

Question

Trying to figure out the cause of this Facebook API error:

Message contains banned content

A Google search only comes up with this relevant resource. Any hints as to the cause/source of the error would be really helpful.

There are some additional details about the environment:

• Error occurs when trying to post to one's own profile
• Posting to friends' profiles works fine
• We have stream_publish and offline_access extended permissions

Thanks!