failure on updating database from 7.1 to 7.3

hello,

after compiling and installing postgresql 7.3 i tried to dump the old
database of the running 7.1-server with "pg_dumpall -o > test" of the
new version like recommendend by the "INSTALL"-file.

it answered:
bash$ /usr/local/pgsql-7.3/bin/pg_dumpall -o > test
pg_dump: column number -1 is out of range 0..4
pg_dumpall: pg_dump failed on adressen, exiting

then i tried the old version of pg_dumpall. this worked and i could
restore the database to a new database version 7.3.

but when i try to backup databases with pg_dump the failure is the same
as known from pg_dumpall and the old database.

can anyone help me?

bye
arnie