Spotty at best in Arizona. In the last 2 days, 5 new caches and I received e mails on only 2 in my set radius of 30 miles. Go to your notification setup edit page and you will see this: Please note: This is not a substitution for searching the web site. You may miss some logs due to site maintainence, bugs, or lunar eclipses. As the first one to know you may know too soon. So consider yourself forwarned.
Looks like they don't know why it doesn't work. Lunar eclipses??? Might as well include solar flares and the stock market fluctuations.