I am running NoMachine Terminal Server 4.0.370 AMD64 on Debian Wheezy 7.3 x64. Currently in 3.5, we are deploying a Linux only application in the floating window mode to our Windows Users. Everything works pretty well.
Testing NoMachine 4, the application does not start maximized as is does in 3.5. When users do maximize the application, the bottom 60 or so pixels across the whole screen(s) are just white. I attached a screenshot to demonstrate an xterm window doing it. I tried a bunch of display setting both in the client and on the actual Windows machines such as changing color depth and resolution with no luck.
This was tested with Windows 7, Windows 8, and Windows 8.1 using the latest player 4.0.370.