Slackware 12.0 + KDE 4.0 3.5
Yesterday, I installed Slackware 12.0 on my laptop, a Dell Inspiron 6400. I’m really surprised because the installation process (relatively) very simple. It’s really different from my previous Slackware installation. I forgot what version of the Slackware, but at that time the installation process was really frustrating.
Today, I finished configuring the system. Then, I used this new operating system to surf on the internet and I was interested in an article about the release of KDE 4.0. Because of the KDE desktop environment installed is 3.5, I wanted to install the 4.0. After read some articles and tutorials, I started to download whatever the installation process needs, from the KDE until the dependencies. However, I can’t download the kdesupport package, because it should be downloaded using svn (subversion). I don’t know why, but it always failed with the error message that the system couldn’t connect to server. Whereas, the kdesupport package is one of the four primary packages besides kdelibs, kdepimlibs, and kdebase. The bottom line is, in the end, I still use KDE 3.5 on my Slackware 12.0. 
I think it’s enough for today. Maybe, I will continue to try installing the KDE 4.0 tomorrow or a day after tomorrow. Maybe… 
If you want to use KDE4, set up a VM and use it in a VM. Most people have found it far to buggy for day-to-day use, and you might too. It would be a lot less hassle to just setup VirtualBox with the latest OpenSuSE Alpha (which has KDE4) and then just remove it when you decide you don’t like it (or want to actually use it). Otherwise, you have to go through the hassle of compiling KDE4 on Slackware, then possibly removing it if you don’t like it which can be even more of a hassle.