Portability of find(1)

[Akim Demaille]

Hi People!

I'm looking for information on the portability of find(1).  Please,
send me everything you know.  In particular, I think I'm understanding
that `{}' is portably replaced by the argument only when alone, i.e.,
exactly

        find ... {} ...

and not

        find ... "foo: \{\}" ...

At least on DU.