Another annoyed S2 user here (raises hand). Mine is dropping the BT connection with my Kenwood BT852HD aftermarket stereo. If I get 5 minutes of solid connection I'm lucky. Not only is it annoying to drop music/calls but seeing my stereo display "HD Connected" "HD Disconnected" "Audio Connected" "Audio Disconnected" every few minutes is incredibly annoying.
Samsung...DO SOMETHING! This problem has been going on for a year as it's obvious by the above posts.