BUG #4121: ERROR: could not open relation 1663/16403/469917: Invalid argument

The following bug has been logged online:

Bug reference:      4121
Logged by:          Boldinov
Email address:      bldnv@mail.ru
PostgreSQL version: 8.1.5
Operating system:   Windows Server 2003 Standart
Description:        ERROR:  could not open relation 1663/16403/469917:
Invalid argument
Details:

2008-04-21 14:35:41 ERROR:  could not open relation 1663/16403/469917:
Invalid argument
2008-04-21 14:35:41 STATEMENT:  SELECT
    _Reference130._IDRRef AS f_3,
    _Reference130._Description AS f_4
    FROM
    _Reference130
    WHERE
    _Reference130._IDRRef =
'\\200"\\000\\033x0\\004\\032\\021\\334\\250\\246\\360\\024\\017_'::bytea
AND (FALSE = TRUE OR
    EXISTS(
    SELECT
    0 AS f_2
    FROM
    (
    SELECT
    TRUE AS _f_1
    ) _V8TblAli1
    INNER JOIN _InfoReg16060 _InfoReg16060_Q_000_T_002
    ON _InfoReg16060_Q_000_T_002._Fld16061_TYPE = '\\010'::bytea AND
_InfoReg16060_Q_000_T_002._Fld16061_RTRef = '\\000\\000\\000\\236'::bytea
AND _InfoReg16060_Q_000_T_002._Fld16061_RRRef = _Reference130._OwnerIDRRef
AND _InfoReg16060_Q_000_T_002._Fld16062RRef =
'\\205Y\\011U\\377\\362\\015\\220D''_3\\367\\352\\200\\247'::bytea AND
_InfoReg16060_Q_000_T_002._Fld16063_TYPE = '\\010'::bytea AND
(_InfoReg16060_Q_000_T_002._Fld16063_RTRef ||
_InfoReg16060_Q_000_T_002._Fld16063_RRRef) IN ('\\000\\000\\0002'::bytea ||
'\\200"\\000\\033x0\\004\\032\\021\\334\\262\\273<\\265)4'::bytea,'\\000\\00
0\\0002'::bytea ||
'\\245\\230\\272~\\361\\313\\223fG\\034\\011\\207X\\325q\\016'::bytea,'\\000
\\000\\000\\324'::bytea ||
'\\257\\332\\000\\004#R\\244\\374\\021\\334\\206\\326\\355\\252j\\360'::byte
a) AND _InfoReg16060_Q_000_T_002._Fld16065 = TRUE))