747 Is up to Series 8 now, and they still build them
One airline has cancelled its 787 order and switched to 747's over safety concerns, as numerous problems have been discovered with the new aircraft including seperation of the composites.... not good
It's normal for problems to be found with new aircraft in the first few years of service, they recently discovered cracks in brackets on the A380 although it didn't put the aircraft at risk and all brackets are now being replaced. The 787 's new composite structure is a different story, as a plane has never been built this way before, and at the moment I wouldn't trust it.