This is common when using heavily customized/massive themes or theme frameworks.
Unfortunately for someone like us looking in, it’s really hard to even tell you where to start. There could be 1,001 different things that are causing things to explode under the hood. To top it off we don’t have access to the theme anyways.
The particular theme you are using is _massive_. I’m fairly confident the theme is likely the issue here, but to be sure you should activate TwentyTwelve and see if that fixes the issue. Assuming it does, then you know the problem is indeed with your theme, at which point I’d ping the developer and see if he knows what’s up.