Why don't I have any Email notifications from some of threads, for ex., 

 - http://serverfault.com/questions/170476/windows-server-2008-connecting-to-127-0-0-1 

as well as entries in revisions or responses or activities lists either for "yesterday", or for "today", or for "this week" :

 - http://serverfault.com/users/recent/47886?startdate=2010-08-08%2000:00:00z&enddate=2010-08-15%2023:59:59z&tab=responses#tab-top
 - http://serverfault.com/users/recent/47886?startdate=2010-08-08%2000:00:00z&enddate=2010-08-15%2023:59:59z&tab=revisions#tab-top

while there were hundreds of revisions, responses, comments during the last 36 hours?