Binary upgrade 7.1 i386 -> amd64 ?

[Frederique Rijsdijk]

I'm planning to binary upgrade a machine that's now running i386
7.1-RELEASE-p3 to AMD64. Mainly because the machine has 8GB of memory
and I don't like the PAE limitations.

I've done this a couple of times before with 4.x -> 6.x but all remained
i386.

Are there any pitfalls when doing an upgrade of i386 to amd64 or should
it be the same as any binary upgrade?

Thanks,

-- F