Website IE problem

My web designer is not able to help me with this problem as he is out of town and not expected back soon. My website has a white line through it in internet explorer and the left side of my menu is shifted a bit from the right. This problem does not show up in safari, firefox and chrome on the Mac. The shift problem does appear in chrome on my PC.

Can anyone take a look at this and give me a recommendation on what might fix this problem? I just want my images to line up correctly and the white line to go away. I know a bit about web design but am a true beginner. Any help would be greatly appreciated.

The website is: