Hi all,
I have installed several Linux distributions based on KDE on my machines, but i always had problem with KDE bugs (and also the ugly window which want to report the bug :-D).
I upgraded my Kubuntu 12.04 to KDE Plasma and Applications 4.9. It is one of the best KDE i have ever seen. I have not seen any bug yet and its performance is better that past.
Congratulation to KDE team for this fantastic release.

have a nice time.