Hello,
I don't know if anyone has seen this kind of problem. IT appears at least on nVidia 7600 and 7900GTX. The rest I don't know, but I guess it also concerns more.
Let's suppose, that You'd like to help Yourself and while playing GW - You decide to go to gwiki to search for the tips about mission. You minimize the game, search for propper thread.
Then - it does not happen all the time, but mostly - You can see the "Compass map" and skills. But all the rest of the world is in one colour (blue or other). Then, You gotta to move Your character a little - move into direction or just "move the eye sight - RMB + move the mouse" and minimize once again. Then, after maximizing, all gets back to normal.
The world disappearance
_Anubis_
Gorebrex
What kind of system do you have? What CPU, memory, video/sound card, motherboard, ect. Does it also happen in other games? When did it start? Are you overclocking anything? All the infomation you can give about your system will help.
combatchuck
Reinstall your video drivers and see if that helps.