Site Is Screwed In IE

I checked my site today in IE to make sure everything was ok and omg the whole site is screwed! All the text is going of the side of the page aswell as the login box.

It all looks fine in FF but 35% of users on my site use IE so I need to fix it but I’m unsure how :/

Could anyone explain maybe what could be the problem? The only thing I can remember doing that may have caused this was:

1. Installed the WP Minify plugin that compresses JS,CSS and HTML. I have now deactivated it to see if it would fix the problem but nope still the same.

2. I added a picture to a post which is like 400px long but I don’t think thats the problem either as I removed the picture for a test but still screwed in IE.

Here is my site: https://www.yourdubstep.com

If anyone could help I would really appreciate it!