GW website not displaying correctly

[fenthwick]

Please move this if this is the wrong section.

I can't seem to view the website correctly (see below for screenshot).
I've installed the latest flash version so it's shouldn't be that and I don't know what else it can be that causes this problem.

[sixshot]

If you think that's bad... wait 'till I show you how it looks like when viewing the site using Firefox on Linux. It really looks messed up there.

[fenthwick]

Maybe but In school it works normaly but now on my new computer it looks like that and I would like to be able to navigate on the site.