Hi,
There is a newer version of the datasheet (28-Jul-11),
but the
information about that did not change.
I also checked the errata sheet for the AT91SAM128 and didn't see
anything relevant.
Maybe we should check if a pullup on PA0 fixes the other board that
had troube with SAM-BA, and if it's the case, just add it ... better
be safe than sorry IMHO. (even if it's troubling not understanding
_why_ ...)
Cheers,
Sylvain