Mr.BA, they sayd that it was not a problem from how the aircraft was built.
They just have to replace or repair something on the winglets.
By the way, corect me if I am wrong, but youre post looks like anti-airbus post...
I don't think there is a big prob. with their winglets since A320 has been in service for around ten years. I don't think A330 has too big prob. w/ the winglets too since the winglets WON'T make a plane crash, even tho it is not too good in their designs. To the max, a bad designed winglets would only give the plane some extra drag while it is supposed to reduce it.