tuples gone?

Hi,

I got an corrupted table,,, unfortunately with pretty important data :(

VACUUM tells me:

NOTICE:  Rel relx: TID 2344/5704: OID IS INVALID. TUPGONE 1.
NOTICE:  Rel relx: TID 2344/5736: OID IS INVALID. TUPGONE 1.
NOTICE:  Rel relx: TID 2344/5768: OID IS INVALID. TUPGONE 1.

(this, many times, then)
pqReadData() -- backend closed the channel unexpectedly.       This probably means the backend terminated abnormally
  before or while processing the request.
 

I can read part (beginning?) of the relation with select or copy, but anything 
that touches this area dies badly :(

Is there any way to recover this relation? Or at least as much data as 
possible?

Oh, an this is 7.1.3 and I am probably running with too large oids :)

DEBUG:  NextTransactionId: 708172974; NextOid: 3480073772

Daniel