EDIT: This is now fixed. Facebook worked on the bug report and fixed the problem within 72 hours, including rollout.
Where I work, I am using an instance of Facebook at Work to communicate with colleagues. That is basically a grey-styled instance of Facebook which is supposed to run a forked codebase on isolated servers.
Today, it would not let me write the following SQL in Chat, in Facebook notes or comments:
Other versions of the error message complain about it being Spam, or mention the string sd.date as being problematic.
Why is that?