I switched to Debian Sid's KDE 4.2 and did look back. The KDE 4.2 bugs are too many to swallow for me. There too much loss of functionality still for a day to day desktop. From this report KDE 4.3 has done little to address this. KDE 3.5.x is still much faster for me, has fewer bugs and fewer headaches. Introduction of new features should not sacrifice old functionality for the sake of developers' whims. This seems to be a basic flaw in the open source community development model.