Theme looks Weird in Opera

Hi there!
Was wondering if someoene could help me out.
I am using the Yellehs theme from http://binslashbash.org/

I just noticed it looks REALLY weird in the Opera web-browser. Everything is squished to the left.
Can anybody take a look at my blog from the browser and tell me what the problem is? And how I can fix it to look normal like it does in Firefox?

Any help would be appreciated! Thanks in advance!