When you start KMag it freezes into position. You have to go to Settings > Follow Mouse Mode to get it to start working again (or click Mouse on the toolbar). You have to do this every time you start it. I don't know if it's a regression from 4.10.2 since I just upgraded to Mageia 3 yesterday, but it is a regression from Mageia 2 and prior releases.
Steps to Reproduce:
There doesn't appear to be an upstream bug report for this.
Still valid in KDE 4.11.3.
Also valid with Plasma 5.
is this bug still valid ?
Not reproduced in Plasma 5.20.1
$ urpmq -i kmag
Mouse cursor is centred on Kmag window and focus is well moved when I move it around.
Tested on bare-hardware and in virtual environment with Cauldron x86_64 and i586.
Yep, it works again. Sweet.