https://forums.highrez.co.uk/viewtopic.php?f=6&t=4182&p=20797#p20794
Actually, not only related to minecraft but thats where the problem shows most significantly. The problem is that for whatever reason, XMBC is unable to find a window under the cursor - and gets back a hWnd of 0, which it then procedes to use and redirect the scroll message to - DOH! It should not redirect if the window returned is invalid OR null!