I use 1280x1024 resolution and the site is partially blocked when I have my sidebar on.
So basically I have to do sideways scrolling or close the sidebar. The problem is that there is lots of free space and I should not have to scroll.
I also notice this on your site...
This website is best viewed with screen resolution 1280*720 or higher. Your current resolution is 1280*1024. If possible, please change the resolution!
Asking your visitors to change resolution is a big deal, I would suggest you remove that and try to tweak your site instead.
I like the look though