OID - file object, are damaged by PostgreSQL.

Hi all,

I am using Postgresql 8.2.

I am using client side api to upload/download files to/from postgresql using
calls lo_export()/lo_import();
If I download a file from postgresql - few weeks later, files object's
contents got damaged.

I don't know why?

Do any of you have encountered same problem?

Regards,
Purusothaman A