As the title suggests, we've got a strange problem, where you can switch to
another screen at the console, but within 2 seconds, it immedietly switches
back to the system console.
Ctrl + Esc brings up the menu select as normal, but as soon as you select a
screen other than system console, it flicks back to the system console. Alt
+ Esc lets you tab through the screens, but again, it flicks back to system
console automatically.

Any ideas? A reboot would no doubt cure it, but its not ideal as it's our
24/7 GroupWise server which has been up for 174 days...