Ji-N:
It seems to be working for me on multiple accounts. Could you tell me who friend request is it from?
Normally, I expect a red square indicator next to the bell icon, but nothing was there. There was no dot indicating a new message either. My most recent friend request was from @aura. I only noticed I had a friend request when I randomly opened my friends list. I think this happens for only certain users, because after the MDL update I did receive notifications for some users, while for others, I didn't get anything.