DC 2.1 activity stream/notification not working as supposed to

Hi,

For the past three four days since i have upgraded to DC 2.10 the activity streaming of related users and groups are not working.

In a particular user's stream only his/her activities are logged and none of the related user groups or users are streamed. In simple words, i don't see notifications of my friends or groups activities except mine.

I have tried all possible groups and forums but no one seens to address my case. Please someone give me some hints on how to correct it