The fourth alpha of Ubuntu 9.10 was released a few days ago and since I covered it earlier in this article, here I'll briefly overview Kubuntu, the KDE-based distribution of Ubuntu. All the screenshots were taken after a complete dist-upgrade, so the software should be completely up-to-date as of today.
The new Karmic currently comes with Linux kernel 2.6.31, KDE 4.3, Amarok 2.1.1 as the audio player, Dragon Player as the default video player. In one of my previous articles I pointed out some of the new features in KDE 4.3, some of which are implicitly included in Karmic, like the new Plasma look, called Air, or the new KRunner.
Konqueror is a hell of a browser, with countless features and ease of use for those who are already used to it. These are not all, but it comes with web shortcuts, enabled AdBlock filters, profiles, plugins, shortcut to various web page translations, user agent switching and so on. There was a time when Konqueror was very unstable, but now I encountered no crashes, with Flash enabled. On the other hand it was always mature regarding features and usability, since the KDE3 days. YouTube works fine also, but I had to manually install the Flash plugin, although package flashplugin-nonfree was already installed.