I posted a question and then deleted it. The text block turned red, and the "delete" button changed into "undelete". Presumably if I click the "undelete" link it will undelete the question; this has worked for me in the past.
But if I visit the same URL in a separate window, I don't see the deleted question or the "undelete" link. Instead, I get "Page Not Found: This question was voluntarily removed by the author – that's you!"
I think I should get the page with the deleted text and the option to undelete.
(The particular post in this case was https://math.stackexchange.com/questions/174286/multiplication-tables-with-all-entries-distinct. I saved the question text locally before I closed the window, so I don't need to have it reinstated, and I don't have any immediate problem that needs to be solved.)
[Addendum: screenshot is here in case it helps anyone else figure out what is going on.]