So today I found a nice “feature” of the new Metro Windows 8 interface. Now that the start button can be exposed by moving your mouse to the bottom left of the screen this does not work well when you have RDP in full screen mode.
I have just connected to Windows Server 2012 using my Windows Surface RT Tablet in full screen and wanted to load up the start menu of the RDP session, moving my mouse to the bottom left corner of the screen will infact bring up the start button on the Windows Surface RT OS and not the RDP session.
A workaround for this is to use the start button on the key board, but the fact remains this adds additional confusion. At least the start buttons are somewhat colour coded to help you distinguish which version they relate to!