I have a PC (WinXP) running in a remote location and I use TightVNC to remote in and control the telescopes.
Using TightVNC 2.6.4 (Build 20th November 2012) on both my PC's.
Whe I load up Tight VNC and connect to the remote PC I see everything just fine. I can operate all software fine and control the telescope.
I have just installed a new software (Stellarium V12) on when I double click the icon to run it all I get is a black screen. If I go to the remote PC and check the screen Stellarium is running fine and visible on the screen. If I put Stellarium into windowed mode and then go back to my main PC and check the VNC session I see the remote desktop and a black windowed screen. So for some reason TightVNC can not show the contents of Stellarium.