I'm testing Captivate 6 with our PeopleSoft ELM LMS. Normally it requires a masteryscore in the imsmanifest.xml file. The SCORM 1.2 output has many new changes and I hope I'm not missing something, but I've checked all the templates and publish options under the quiz properties.
We too would like to know this.
I put in a request to Adobe and found through some of their technical staff that the masteryscore is not a field needed by Learning Management systems. If you want to add it manually, you still can after the imsmanifest.xml file is published with the SCORM package.