The following bug has been logged online:
Bug reference:      4746
Logged by:          Igor
Email address:      mayorsheff(at)ua(dot)fm
PostgreSQL version: 8.3.6-1
Operating system:   Windows XP SP2
Description:        relation with OID #### doesnot exists
Details: 
Good day.
Repeated error: "relation with OID #### doesnot exists", when using
temporary tables in the procedure. This table and then remove and
re-created. Help please.