Comment 4 for bug 1338973

a simple fix is to uninstall kde-touchpad and download a more recent version from https://code.launchpad.net/~kubuntu-ppa/+archive/ubuntu/experimental although i've been trying to find direct link to .deb file but w/o luck.

you don't need to add this PPA just install updated package if you can find it.
launchpad has horrible ui/ux, i was lucky to find it the first time.
example: you can see updated touchpad version on this ppa packages list but you can't click it and get more info/download.

i really appreciate hard work required by developers to produce ubuntu/kubuntu even dough they use tools like launchpad in their daily workflow.