They have posted some stuff on graphics and optimizing performance. They said a lot of people will experience problems because of their drivers. Make sure you have new drivers for your graphics card and if you keep getting problems use the GW2 Repair. To do this just go to you .exe file and create a new shortcut to it. Rename the file "Guild Wars 2 Repair". Right click the shortcut and go to properties and find the target line, at the end of it put "-repair". Save the changes and double click the repair shortcut and let it do it's thing. If none of this works then read through their support posts and check the latest news on what they're doing with maintenance.
