I am on Fedora 24 with the MATE desktop environment. I did a
dnf update and I have noticed now that when I simultaneously press both mouse buttons it acts as if I have clicked middle mouse down.
Is there any way to disable this? I have never noticed this before so I think it may be related to the upgrade I just did. MATE 1.16.1 is running at the moment. Could not find anything when googling/looking through dconf/other settings.