In a previous thread that I have done, I asked if it is possible for the A380 to carry side-by-side LD-1 containers like the 747, and the answer I got that it isn't, since the A380 was designed around side-by-side LD-3s.
Which leads me to this question: Is the A380 cargo hold narrower than the 747? The A380 fuselage is slightly wider than the 747, but it seems strange that Airbus would design it with a narrower cargo hold. Unless there is a different reason why the A380 cannot carry side-by-side LD-1s. LD-1s and LD-3s occupy the same amount of floor space, however, the outer contour on the LD-1 is larger than that on the LD-3.
[Edited 2012-09-24 17:24:14]