Hello all,

This probably has been asked before, but sometimes when I add a comment to a picture that hasn't been commented on in years, I get follow up replied almost immediately. For example:

http://www.imcdb.org/vehicle.php?id=14654

This happens quite occasionally. How do other users know I've made a comment? Surely they can' be just coincidence that they were viewing the same picture I was at the same time.