I'm not sure about that Mark, the following from Metalink 359145.1 seems to contradict it: "When any data, either in the dictionary or in the user data or in the usage of time zones in PL/SQL, uses the affected time zones, then the patch is needed." Sounds to me like you need to patch 10g even if your app doesn't use the TZ datatypes - unless you don't use the affected time zones. Maybe I'm misinterpreting or missing something though? Regards, Brandon ________________________________ From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Bobak, Mark Note that 10g uses timezone aware datatypes in the data dictionary in 10g (or so Oracle claims, I haven't gone looking for them), but as long as your app doesn't use the datatypes in question, you do not need to patch. Privileged/Confidential Information may be contained in this message or attachments hereto. Please advise immediately if you or your employer do not consent to Internet email for messages of this kind. Opinions, conclusions and other information in this message that do not relate to the official business of this company shall be understood as neither given nor endorsed by it.