About an hour minutes ago I posted this question:
However, although the question was immediately searchable on the 'twitter' site tag, and after an hour it is listed in the 'newest questions' section, I was monitoring 'newest questions' at the time and the question did not appear.
This question seems to list the same bug:
But lists it as fixed, so I guess this one is something different? Particularly as the original askers' question didn't seem to appear in the timeline at all... though at the same time he didn't wait an hour, so perhaps it appeared after his question was asked...