I upgraded my Gentoo Linux box very recently. I don't do it very frequently, so this implied major changes in almost every component in my system. This includes the kernel and the vmware workstation I use. Sadly this did not go as smoothly as I wanted. The KDE desktop became very unstable and the vmware became painfully slow. I use vmware to run certain windows applications, for which I don't have feasible Linux alternatives (very few actually). Fixing KDE was very easy, I tried XFCE and fell in love with it. With vmware I struggled for days to fix this issue, so I think my findings may be useful for others.