When running a single application (floating window) from a Windows client, the bottom of the application's window is cut off, leaving a white strip across the screen. An example of what you can see is here:

https://www.nomachine.com/forums/topic/single-application-floating-window-cut-off-at-bottom-when-maximized

This has been reproduced on both RHEL 6 and Debian 7.3. Changing colour depth and resolution makes no difference.