UPDATE 2: The fault was mine, I've mistakenly set one of the question tags,
(calculus), as ignored in my list of preferences. I've removed if from the list and everything is OK now. Thanks to @Integrator!
UPDATE: This is not meant to publicize one of my answers!
And here is a screen shot of part of the main page where the question with the actual title "calculating the taylor term of an integral" should appear, but it didn't.
The screen shots don't differ more that one (or two) minutes.
It's the first (or the second) time this happed to me while logged in. The browser was Firefox 31.0. None of the question tags is one of my ignored tags, which would hide the question to me. However, when visited the site without beeing logged in, using other browser (IE and Opera) I saw the question on the right place.
Is there some explanation for this weird behavior?