While we prepare the KDE 4.2.1 packages, we have disabled publishing the built packages on the KDE 4.2 repo and its dependencies:
KDE:KDE4:Factory desktop, KDE:KDE4:Factory:Extra-Apps,
and the KDE:KDE4:Community repos that build vs F.D.
This means you won’t see any updates on those repos for a few days. The planned release date for 4.2.1 is March 4 2009.
The best answer is go to that web KDE Community Forums , ask them directly and I`m just saying nicely way to you.
They can tell you because the build KDE.
Took a look in software-installer, as well as repos: I see packages in Qt and Qt45 are resp 4.5…43 and 4.5…44, anyway 4.5 packages. On my laptop the overall performance has increased, and not just a bit.
Performance is wonderful, smooth running desktop. Better and better