Big2Fan I believe was the name of who came up with it but the fix works nonetheless.
I also have this problem and a fix for it
First go to run > regedit.exe then look for:
HKEY_CURRENT_USER/Software/Cryptic/Cryptic Launcher/WindowPos
Delete the WindowPos completely and launch the game again, it will work.
This fixed mine and several others have posted that it fixed their issue as well. I'd strongly suggest that if you're not familiar with regedit to >NOT< do this yourself and contact someone who is until PW releases a .reg file for a simple fix.
DISCLAIMER
While this fix DOES work, neither I or the original person who came up with it are responsible for any mistakes you make if you try to work with regedit and make a mistake. Perfect World and Cryptic are also not responsible for your mistakes. When in doubt, print the above information out and take it to your local PC Professional.