Every time I play Spiral Knights on Steam I always get graphical errors such as the:

Metallic-style Ice Queen Crown Graphical Error http://steamcommunity.com/sharedfiles/filedetails/?id=444211606

and the

Drop Graphical Error http://steamcommunity.com/sharedfiles/filedetails/?id=444212731

I have verified my game's cache multiple times and reinstalled the game many times but the issue is still in effect. Help?