I probably won't be able to do much with this unfortunately as the game is still in the beta stage and not released yet. Your crash report has been logged and it's the only one I see so far with this issue which usually indicates a problem on the client side and not the game itself.
For now, can you post some information about your computer? You can find this information in the Direct X Diagnostic Tool:
Click on Start Click on Run Type in: dxdiag (In Vista, type dxdiag in the search field) Hit Enter or OK
Click on the Save All Information button at the bottom, and create a dxdiag text file, and copy and paste it ALL here.
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