Toad Advisor display "Client version (10.2.0.4.0) and server version (18.104.22.168.0) should not be used together according to metalink note 207313.1." However, the metalink article note doesn't refer to Oracle 11g or 10g support information. It is the wrong article.
OPM API leaves Descriptive Flexfield Attribute columns blank in FM_FORM_MST [ID 207313.1]
Please refer to Metalink article 207303.1 Client / Server / Interoperability Support Between Different Oracle Versions [ID 207303.1]
Waiting for fix in a future release of Toad for Oracle.