I have 4 servers running Bugzilla (2.20.1) with a Postgres backend

On all of the servers I can upload a binary attachments fine.
On 2 of the servers, when I download the same attachment it is
corrupted (same file size but diff says they're different)

The other 2 servers are fine.

They all have the same OS (Redhat ES 3), the data type on the
attachments field are bytea on all boxes, and a description of the
postgres tables are indentical

Has anyone had this problem?