I saw the KDE 4.6.1 announcement, but I didn't see an announcement, a word or a single letter about its most important feature. Well: I'll do that.
THIS IS THE FIRST KDE RELEASE IN WHICH YOU CAN ACTUALLY USE THE NEPOMUK SEMANTIC DESKTOP.
NO CPU EATING.
EVERYTHING WORKS, FOR THE FIRST TIME, AS DESIGNED.
Keep that in mind. If you upgrade from KDE 4.6.0, you'll see Virtuoso running at 100% of your CPU for a minute. This is normal: Virtuoso is converting your database from a buggy format to the new format. That will be the last time you'll see Virtuoso hogging your CPU.