Here is the output I'm getting from a restore -t -b 32 -f
/dev/nst0:

Verify tape and initialize maps
End-of-tape encountered
Mount tape volume 2
Enter ``none'' if there are no more tapes
otherwise enter tape name (default: /dev/nst0) /dev/nst0
Wrong dump date
        got: Mon Aug  2 09:12:51 1999
        wanted: Wed Dec 31 18:00:00 1969
Mount tape volume 2
Enter ``none'' if there are no more tapes
otherwise enter tape name (default: /dev/nst0)

It seems to get the header information fine off of volume 1,
but can't
get the header information off of volume 2--it keeps getting
the
timestamp 0.  Can it be possible that the dump is not
correctly putting
out header information when it needs to span a fileset to a
second tape?