DB Crash, recoverable?

Hi All,

Our database just reset and now I'm getting Errors in the log and I
would like to know if this is recoverable. Here's the segment of the
log right before and after it reset.

LOG: unexpected EOF on client connection
ERROR: type "t" already exists
ERROR: duplicate key violates unique constraint "pg_type_typname_nsp_index"
ERROR: duplicate key violates unique constraint "pg_type_typname_nsp_index"
ERROR: duplicate key violates unique constraint "pg_type_typname_nsp_index"
CONTEXT: SQL statement "create temp table tmp_children ( uniqid bigint, memberid bigint, membertype varchar(50), ownerid smallint, tag varchar(50), level int4 )"
PL/pgSQL function "fngetcompositeids2" line 14 at SQL statement
ERROR: duplicate key violates unique constraint "pg_type_typname_nsp_index"
ERROR: cache lookup failed for type 2449707570
FATAL: cache lookup failed for type 2449707570
LOG: server process (PID 5834) exited with exit code 1
LOG: terminating any other active server processes
WARNING: terminating connection because of crash of another server process
DETAIL: The postmaster has commanded this server process to roll back the current transaction and exit, because another server process exited abnormally and possibly corrupted shared memory.

...
ERROR: cache lookup failed for type 2449707570
ERROR: cache lookup failed for type 2449707570
ERROR: cache lookup failed for type 2449707570
ERROR: cache lookup failed for type 2449707570....

This has happened in the past, however the only way I know to fix it is
a dump and restore.

=> select version();
version
-----------------------------------------------------------------------------
PostgreSQL 8.0.0beta5 on i686-pc-linux-gnu, compiled by GCC gcc (GCC) 3.4.2
(1 row)

Thanks
Michael