'emerge -uD world' upgrades kdelibs, kdemultimemdia, kdeedu and so on from version 3.1.2 to version 3.1.3. The next world update downgrades them back and so on. Reproducible: Always Steps to Reproduce: 1.emerge -uDp world -- you can see that the libraries will be updated 2.emerge -uD world 3.emerge -uDp world -- you can see that the libraries will be downgraded Expected Results: publish the empty list of packages to be upgraded :)
The issue was resolve by recent portage update.