Sorry for thread necromancy, but I just bought this mouse as well and it's definitely a software bug. I don't play DayZ myself, but I've encountered this problem in three more games - Alan Wake, World of Tanks and War Thunder. In each of these the universal scroll button causes the camera to go up and to the side or down and to the side, releasing it causes the camera to jolt again. However, if you either uninstall the Steelseries software or activate in-game mode, the middle click works fine. However, the mouse works as a standard 5-button mouse then and thus you cannot use any other buttons than left, right, middle and the two top ones on the left side. I opened a support ticket with Steelseries, but if they can't fix it, I'm returning the mouse. cya Raziel-chan Edit. Well, I found a solution. You need to export the profile you're using from the Steelseries software and save it somewhere. Then, open the file in your preferred text editor and scroll all the way down, until you see a column like this: <BUTTON_1>1,1,</BUTTON_1> <BUTTON_2>2,2,</BUTTON_2> <BUTTON_3>3,6,</BUTTON_3> <BUTTON_4>4,9,</BUTTON_4> <BUTTON_5>5,9,</BUTTON_5> <BUTTON_6>6,6,</BUTTON_6> <BUTTON_7>7,4,</BUTTON_7> <BUTTON_8>8,5,</BUTTON_8> <BUTTON_9>9,9,</BUTTON_9> <BUTTON_10>10,9,</BUTTON_10> <BUTTON_11>11,9,</BUTTON_11> THe third digit in each column might be different for you if you changed the bindings, so you might have <BUTTON_1>1,2,</BUTTON_1> instead of <BUTTON_1>1,1,</BUTTON_1>, it doesn't matter. We won't touch the <BUTTON_1></BUTTON_1> tags, what we wanna edit are the numbers between them. As an example: <BUTTON_3>3,6,</BUTTON_3> - we see 3,6 there. 3 is the button number, 6 is the function number (autoscroll). You cannot set middle click from the software level, but I found a nice post where there was a list of button codes. The code for middle click (or at least something working like it) is 101. So, if we want the middle click under the scroll wheel button, we change <BUTTON_3>3,6,</BUTTON_3> to <BUTTON_3>3,101,</BUTTON_3>. Then just import the profile and hit APPLY in the software panel. The third button binding should change to Move and Steer. And voila, working perfectly now. And Steelseries software sucks. Useful links: http://www.evilbox.ro/windows/customize-and-bind-any-key-to-steelseries-world-of-warcraft-cataclysm-mmo-gaming-mouse/ <- the blog post where I found this way of editing macros. http://www.evilbox.ro/blog/wp-content/uploads/2013/03/SteelSeries_Mouse_Bind_Codes.pdf <- List of key codes that post's author put together.
