It's a pretty small issue anyway; of course perhaps any issue is not small in aviation. I read the report from the British Air Safety folks released a couple days ago and they basically had to try about five times to replicate the ice in fuel lines problem, and even then, the possiblity of the issue (uncommanded throttle back - that's not the right wording though - they called it something else) occuring was still remote. It was a certain temperature for a certain amount of time and some additional turbulence, water content in fuel, etc. in order to provide the possiblity for the ice that forms in the fuel system to jam up the engines.

Having said that, the report also said that it may have happened to another Delta 777 with RR engines at altitude (ie 37000 feet), though it was resolved by following the uncommanded engine throttle back procedure (or something as impressive sounding).

I spoke a number of years ago to a Qantas 767 pilot who commented that while he really believed the RR engines were safe (as Qantas used them on their 767's) he preferred the GE engine. He said there was a funny quirk in the RR engines when he selected from take off to climb that caused a brief throttle back; his exact words were "GE Engines are the best ones out there". That's just one opinion. I'm sure there's other pilots around who might comment.

On the upside, not really an issue on AC as noted since they don't use the RR engines.