Our developer has found some features failed on the IE 8 running on Windows XP. We are looking into the issues and working on the fixes. But it is good to know that some scripts work on Vista/Windows7+IE8, Firefox, Safari and Chrome but not on XP+IE8.

Ok we have found the javascript that works in IE8 on Vista and Windows 7 but not on XP. It is the code below.
document.getElementById(id).offsetLeft

We have to change it to $("#"+id).position().left