IE6 formatting issue

I am using WPG2 and the SideBarGrid. The theme has two sidebars and I am putting the grid in the left one. Everything looks great in IE7 and Firefox, but I noticed a few of my friends' computers kept displaying the grid at the bottom of the right sidebar. After doing some checking, I found that it is when the page is viewed in IE6. I noticed that another guy had a problem with the tree view in IE6 back in May, but he got no replies. Is there any special formatting that needs to be done in the CSS files to make these WPG2 plugins display correctly in IE6? Thanks.