On August 6th I made
this thread and got the maintenance page. Refreshing caused a duplicate thread to be made so I deleted the duplicate. Sometime later the original thread disappeared from the IB front page but the thread could still be accessed when a link for it was present on the forum front page. When you follow that link it takes you to page 2,117 of 1 within the original thread. I resolved the issue by making a
new thread with a different name.
In summary, being redirected to the maintenance page when making a thread produces a duplicate thread. Deleting the duplicate will cause the original to become hidden but still accessible with a link such as the one above. When a link to the original is followed from the forum front page it bring you to an impossible page within the hidden thread.