I was missing compiled wallet binary for linux. I prepared one for Debian Wheezy: http://tomasek.cz/stuff/kittehcoin-v0.6.4.1-unk-beta-linux-amd64.tar.bz2

Compilation is easy:

git clone https://github.com/kittehcoin/kittehcoin
qmake
edit Makefile and add -I/usr/include/miniupnpc to INCPATH (default /opt/local/... can't work)
make

and wait.