Fixed for me also.

No change here with the big update today, still crashes with the same error on exit.

I just deselected my onboard sound which is Realtek ALC889 8 channel (yes the manual says 8Ch) and used the Xbox Wireless headset as the default sound device instead. Arma 3 did not crash on exit.

I do not use a USB headset, although I do have a Xbox 360 Wireless receiver for Windows plugged in, which I can use a Xbox 360 wireless headset with, but I haven't switched on the Wireless headset or ever used it with Arma 3. I will test it tomorrow without the receiver plugged in and will report if it stops the crash for me, I doubt it will make any difference though.

As mentioned in my last report removing the Wireless receiver for Windows made no difference as expected, even with today's update.

I have the same crash on exit, everytime I close Arma 3. I've only been testing for a short while though, since 8th May.

Mini Dumps and DXDiag are in the zip linked to below.

https://dl.dropboxusercontent.com/u/21030205/Arma%203%20Alpha_Andydigital.zip