I seem to be having this problem Too. Using Version 1.9.1.1.
I had Cron Doctor installed and that would show everything scheduled and when it ran.
I looked at it today and the last scheduled event was a week old.
I added a send mail to my cron.php file to insure it was working and I got the emails so I know it’s working.
I also have M2ePro installed it shows cron is running for it.
I’m thinking it’s a problem with Magento maybe something to do with the security updates.
Anyone know what’s going on?
