I have a windows host and guests with 2 monitors. I just upgraded from version 7.2.6 to 7.2.14 and now see issues with the second screen in guests that have 2 screens configured.
Basically The second screen is black. Yes i have upgrade my guest additions to 7.2.14 and rebooted.
If I open an app in the guest and it opens to the second screen It does not display the screen is black. I can minimize the screen and that is fine. but When I bring back the screen it is still black.
If I toggle Full screen mode twice everything is fine, both screens can be seen along with apps can be moved between screens.
Right now, I consider this an annoyance, but I can work around it. Has anyone else seen this behavior?