Perhaps I was a bit hasty in my initial post
I believe that the network connection was causing the problem. From the Kubuntu KDE I couldn't access the internet, nor even ping my router.
It seems that my onboard NIC is not working straight out of the box, however the additional PCIe one does.
I've just swapped the cables over, and I now have a working internet connection. This along with a fresh install seems to be doing the trick.
Oh, and I've just de-odorised my font folder, sorry for any nasty niffs!