I think I found one, although it may be related to the thread update (I'm posting this 2 hours and 30 minutes after you mention it may take several hours). In the Universe today forum, when I click on the last post button, I get an error message telling me that no thread has been specified. Other forum's last post button seem to be working normally.

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Some try to tell me, thoughts they cannot defend,... - Moody Blues.