The latest version of KDE, 4.7, was released in July. There were questions regarding its availability for Fedora 15. After some initial indecision it has been made available but not in official updates. This is due to changes in the packaging.
One of the criticisms of the way KDE was packaged for Fedora was the use of metapackages. These metapackages reduced the number of available packages but meant you needed to install many applications you didn’t want to get one that you did. While this made it simple for new users it was an irritation for more experienced users. With 4.7 this has changed and individual packages are available for most KDE apps. The metapackages still exist but they are more like groups now as they will pull in a number of other packages. The metapackages themselves are empty.
So KDE 4.7 will be part of Fedora 16 but not released officially for Fedora 15. However packages have been made available for those who can’t wait. See this post on the KDE mailing list for details on updating Fedora 15 to KDE 4.7.
I have been using it for a few days and find it is quite stable. While most of the changes are not immediately obvious the more you use it the more you find. Many of the packages are updated to new versions. One I noticed straight away was digiKam which is now version 2.
If you are using Fedora 15 KDE I would suggest updating as this doesn’t feel like a testing release more like a regular stable release.