Giok--
Where are you? When it happens to me, I blame it on being in California. Seriously, we're at the end of the line. Somebody in UK gets a good idea, Atlantic coast responds, etc., etc. By the time the great Pacific-Asian void cycles thru, the novelty has worn off and the thread dies. Alternatively, I am so dense that I never have any ideas worth responding to, but surely that can't be the case, so it must be the former.
CC