After installing 6.7 I chose to move away from xfce4 and use Awesome as my window manager. I noticed I don't receive these errors anymore.
wsmouse0 detached ums0 detached uhidev0 detacheduhidev0 at uhub2 port 3 configuration 1 interface 0 "PixArt USB Optical Mouse" rev 2.00/1.00 addr 5
uhidev0: iclass 3/1 ums0 at uhidev0: 3 buttons, Z dir wsmouse0 at ums0 mux 0 Jon