The thread on copyright was closed to comments after 24 hours. I assume that either there is a bug that made the thread think it was 30 days old, or Matt has decided that all that needed to be said has been said. Either option points to a problem with the system somewhere.
This is a minor bug, but if you go into the July Archives page, the Waking Life thread says it has 69 comments. If you click into the thread, the parenthetical reports 68 comments.