kde respects bugs. bugs in kde3 have their equivalent in kde4. rule of thumb in developing kde is 'we do not fix bugs. ever.' the worst part is that important bugs in kde3 were not fixed in several years. it's been two years now and kde4 doesn't even provide the features kde3 did (oh yes, instead it is providing hundreds of new features, which all make it a very productive environment - especially if you know how to kill kdm every 2 hours)