I used to work on the "high density" AML aircraft operating for BA. there was a "phenomenon" associated with airflow, the high amount of pax we had 28J and 355M, and the way the aircraft manouvered in flight. Similar problems were also reported by other 777 operators including Delta, Continental and American. Of course studies were undertaken and the Airlines found no adverse conditions etc. Eventually our aircraft were tinkered with and the "phenomenon" went away. so in answer , yes there is something with the 777 but know ones really knows what/why/how.............. or so they say!!
