After you apply CPUOCT2007 (Patch 12) on top of Oracle 10.2.0.3 you’ll get error during full database export, such as the one shown below:

. about to export SYSTEM's tables via Direct Path ...
. . exporting table                    DEF$_AQCALL
EXP-00008: ORACLE error 6550 encountered
ORA-06550: line 1, column 18:
PLS-00201: identifier 'SYS.DBMS_DEFER_IMPORT_INTERNAL' must be declared
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored
ORA-06512: at "SYS.DBMS_SYS_SQL", line 1204
ORA-06512: at "SYS.DBMS_SQL", line 323
ORA-06512: at "SYS.DBMS_EXPORT_EXTENSION", line 97
ORA-06512: at "SYS.DBMS_EXPORT_EXTENSION", line 126
ORA-06512: at line 1

Bug is documented in Metalink note:
464672.1 “ORA-06512 SYS.DBMS_EXPORT_EXTENSION And PLS-00201 SYS.DBMS_DEFER_IMPORT_INTERNAL in 11g Export Or After OCTCPU2007”

The recommended workaround is to grant the missing privileges:

GRANT EXECUTE ON SYS.DBMS_DEFER_IMPORT_INTERNAL TO user_doing_export;
GRANT EXECUTE ON SYS.DBMS_EXPORT_EXTENSION TO user_doing_export;

By the way, a short tip: we’re running full export with rows=n on a daily basis. Why? Because we’re keeping those dumps long-term, if anyone wants to get some DDL definition or PL/SQL procedure/package from the past, we can extract the source with the excellent free utility DDL Wizard. DDL Wizard can parse empty (rows=n) export dump files.