The "Today I Learned" thread is currently being listed as last having a reply 17 days ago when in fact there have been six further replies since then. For all I know this isn't the only thread with the problem.
Did you see the error:
Oops! Something went wrong. Please reload the page and try again.
When you posted in the TODAY thread?
Yep, but that's not really helpful; since the posts themselves did get posted "trying again" would just duplicate things.
BUT... Error messages are CLUES and should always be mentioned.
I submitted this issue to the owners yesterday morning.