8.0B2 checkpoint error on start up

Upgrading 8.0b1 to 8.0b2 in place.
Did I have to do a dump/restore?
Or is this a known problem?

--elein

$ pg_ctl start -D $PGDATA
postmaster starting
/local/pgsql80/data[postgres:cookie]
$ LOG:  database system was shut down at 2004-09-14 13:40:43 PDT
LOG:  invalid magic number D05B in log file 0, segment 34, offset 7495680
LOG:  invalid primary checkpoint record
LOG:  invalid magic number D05B in log file 0, segment 34, offset 7438336
LOG:  invalid secondary checkpoint record
PANIC:  could not locate a valid checkpoint record
LOG:  startup process (PID 4574) was terminated by signal 6
LOG:  aborting startup due to startup process failure