This is Windows 8.1 only, not 7, not 10. It is not known whether 8.0 is affected.
The current known operative case is Citrix-hosted applications, in a dual-monitor situation. If you see a malfunction, go to Control Panel, All Control Panel Items, Display. If “Let me choose one scaling level for all my displays” is unchecked, check it. It will require logoff/logon. And the problem will be fixed.