If you are saying that you now have on your HDD an installation that is fully upgraded ('rolled'), i.e. it is equivalent or newer than what the SL 13.04 KDE LiveDVD would have installed, then the only thing I can think would cause the problem you saw would be a difference in the SL Installer on the SL 11 LiveDVD and on the 13.04 LiveDVD. I don't know if lxnay
made any changes to the SL Installer since the SL 11 LiveDVD was released, but it is possible. For example, I had to hack the installation from the SL 10 Xfce LiveDVD on this laptop (Acer Aspire 5536) to get it to boot to a desktop, whereas I didn't when I re-installed SL to this laptop from the SL 11 Xfce LiveDVD. (The former LiveDVD installed SL without problem to an Acer Aspire 5920).
Anyway, I'm glad to read that you are now sorted and have a working up-to-date installation. As I'm in a good mood, I'll save you the work of marking the thread as solved and do it for you.