Kubuntu 13.10 has been released a day before yesterday! Hooray!
I did an upgrade a little bit prior to the final release, and everything went smooth and works properly. There is just one thing where I needed to put hands on manually. This is my Apache (used for development only) configuration which seemed to be incompatible with the version brought with 13.10. This however is nothing Kubuntu specific, but related to all Ubuntu-flavours.