multi-platform dump and restore?

[Mark B.]

If I dump on amd64 should I be able to
extract files from the dump on i386?

If so, should it be possible to restore a
FreeBSD amd64 dump on OpenBSD i386?

Note there is ticket that may be related:

     bin/67723:

     restore(8) FreeBSD 5.x restore cannot handle
     other platforms/Linux(extfs)-dumps anymore

ref: http://www.freebsd.org/cgi/query-pr.cgi?pr=67723&cat=

I thought the dump file format was sacrosanct.
Has there been heresy here?

Thanks,

m

P.S. Please CC, I'm not subscribed.  Thanks.