Patches that are bundled with a Solaris package, and are NOT available through Sunsolve used to be ignored by the agent seeking mechanism.
This caused:
Failures in the patchadd/patchrm execution as these patches are invisible to the agent resolve - but not invisible to the patchadd/patchrm command dependency checks.
Wrong incident reports
The new release of Sun Update Connection - Enterprise introduces an optimization in this area, such that whenever a patch, which is unknown to the application, is detected as installed, the agent tries to mark the closest patch (with a lower revision in the vtree) as implicitly installed. In this case at least the obsoleted revisions will be marked correctly and the resolve/reports will generate the correct results.