Patching tools have changed to handle larger patches. Starting with patch 119254-42 and 119255-42, the patch installation commands, patchadd and patchrm, have been modified to change the way in which certain patches that deliver new features are handled. This modification affects the installation of these patches on any Solaris 10 release. These deferred-activation patches are better equipped to handle the large scope of changes that are delivered in feature patches.
For more details, see http://www.sun.com/bigadmin/sundocs/articles/patch-wn.jsp.