I have three stack overflow items that I never received updates for in the last few days. I have my preferences set to receive daily inbox updates to my gmail address but I didn't get any updates. I was viewing a SO question today and I saw that there was stuff in my inbox so that's how I noticed. Admins if you need more information you can e-mail me because I don't know if I'll receive an update when you reply to this bug. Thank you
I've checked you user history records and you access SO very frequently, almost every day; in addition, your inbox notification email frequency settings is set to daily. Keep in mind that you get a notification email only if there are unread notifications in your global inbox at the time the scheduler sends out the emails.
If you want to be notified more frequently set the inbox email frequency to every 3 hours.