Formatting Questions – images / firefox

I’ve got a couple of questions this morning.
the site in question is
http://www.jetshack.com
The first question – You’ll notice that I’ve created buttons for the links on the right column except for those under weblinks. The thing is, I created buttons for those also. They’re just not showing up. After I put the path in for them as … \images\sample.png… I then view then site the pictures don’t show up… So I go back to manage links check the path and it says… \\images\\sample.png. To make it even weirder, I completly deleted the category Web Links, which moves the links into the JetShack Links Category… and then the images do appear. But after recreating the Web Links Category and moving the links back, the pictures go away once again.
My second question, I primarily work on my site when I’m at work. We use IE at work. I implemented a new template yesterday at work. When I got home I noticed that the right and left columns were up in the header using firefox. I think I’ve fixed that but can’t be sure. Can someone check that out for me?
Thanks
Jacks