And, it is most likely due to user error, but.... The toolbar on my desktop (the one with the KDE launcher) now has a black background with black graphics. They are largely unreadable. I recently upgraded to Linux Mint 14 KDE and then I upgraded to KDE 4.10, following zerozero's instructions. Following the initial upgrade, the toolbar's windows were all translucent. They looked like ghost images. I found this especially annoying in the KDE launcher. I went through System Settings trying to correct the matter, with the end result being the black on black graphics I described above. Only I don't know exactly what I did to change things so I cannot correct it. Other than this, and some difficulties with Akonadi and the shut down process, everything else is fine. It may be my imagination, but, with the upgrade, things appear to have sped up just a bit. I like it, but I would like to read the toolbar without so much straining.