I recently updated my Ubuntu 12.10 setup to 13.04 using
After going through the process and rebooting, I was a little confused by the GRUB menu showing a "Kubuntu" option instead of "Ubuntu" as it usually did.
After choosing it, it then shows me a Kubuntu splash screen during the bootup (consisting just of a blue "Kubuntu"), but the subsequent login screen and desktop are fine.
I do have a KDE setup besides Unity (I had installed
kubuntu-desktop way earlier when I was running 12.04), but I don't see why it should have affected the GRUB menu and the bootup splash screen!