BUG #3567: invalid page header in block XXXXof relation

The following bug has been logged online:

Bug reference:      3567
Logged by:          sapna kapoor
Email address:      sapna.kapoor@nic.in
PostgreSQL version: 8.1.9
Operating system:   RHEL 5.0 AS
Description:        invalid page header in block XXXXof relation
Details:

We have database of 300 tables ,
some tables are giving error :
ERROR:  invalid page header in block 32655 of relation "AAAA" while
accessing.

Some are giving
ERROR:  could not access status of transaction 1778384896
DETAIL:  could not open file "pg_clog/06A0": No such file or directory

We are in the process of loading data from distibuted locations. We are
importing data onto this server from the export files taken from distributed
locations.