KDE 4.5.4 (why wasn't that codenamed "pound" or such?) was released some time ago, so there's updated OpenIndiana packages available. You can find them at the KDE 4.5 package repository. The naming is now deceptive: it's KDE 4.5.4 in the 4.5.3 repo. Use specific FMRIs if you want to stick to the previous version. Only KDE packages were updated, so all the dependencies stay the same.
We have decided to drop OpenSolaris build 134 as a target. You can use these packages on OpenIndiana build 147 or later or Oracle Solaris Express build 151a. Maintaining compatibility with the older OSOL was increasing the complexity of building packages, putting our resources under strain. So we dropped it. We're also still on the fence regarding Solaris 10 -- no one seems to want it, which means that it may be swept under the rug sometime as well.