See the IBM Flash announcement.
Significant new functionality was delivered in this Fix Pack. According to the README file:
1.2.2 New support
126.96.36.199 Active Directory User Registry
This fix pack adds support for Tivoli Access Manager 6.0 environments where the Tivoli Access Manager Policy Server is configured against an Active Directory user registry. See section 8.0 of this README for further details.
188.8.131.52 Local Credential Cache
This fix pack adds additional functionality to the Tivoli Access Manager for Business Integration server to enable it to function while disconnected from the user registry and the PKI registry. This will allow for deployments where Tivoli Access Manager for Business Integration is only sporadically connected to these infrastructure pieces. See section 9.0 of this README for further details.
As many of you know, Tivoli Access Manager for Business Integration (TAMBI) is moving to the WebSphere family of products in both name and behind the scenes in the development labs. This Fix Pack is the first delivery of the WebSphere-branded product and represents a significant milestone. With all of the recent activity and interest in WebSphere MQ security, this could not have come at a better time.