I think I've had this problem for a few years now, but chose to ignore it.
Every time somebody left a post on a thread I contributed to I used to receive a notification email alerting me to forum activity. One day it just stopped. I would love to have it back. As I am not a regular poster it helps me keep track of interesting conversations. Otherwise I end up forgetting about them!
Sotiris, I know I already asked this but I still have the same problem. I would absolutely luuuuuuuuurve to once again receive email notifications about forum activity. I have the check box ticked at my end (it has always been that way) but everything is still dead.