It is possible—indeed, in some senses, it is the point of this test page—that IE/Win may crash or act in peculiar ways on this page.
div with an id that has a value of all. It may cause conflicts with IE/Win's document.all.
The following problems are known in IE/Win:
Any attempt to reference document.all via scripting in IE/Win will return an object corresponding to the ID'ed element. This could cause severe problems for scripts that rely on the document.all method that usually exists.