Qemu / KVM always wants to be on top

Whenever I pass with the mouse over the KVM (qemu) window, it automatically raises on top, obscuring other windows on the same desktop, which is rather intrusive...
No other application does this.

> dpkg -l qemu-kvm
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name           Version      Architecture Description
+++-==============-============-============-=================================
ii  qemu-kvm       2.0.0+dfsg-2 amd64        QEMU Full virtualization