Why does Internet Explorer not support bookmarks with both a querystring and a hash/anchor? Firefox works properly

Question

I am using anchor-bookmarks to move to the top, middle or bottom of the page when the page loads.
EG: <a name="mid"></a>

Now, when I simply pass an anchor-bookmark(#) in my URL then it is working perfectly in both IE and FF browsers.
EG: http://.../Test.aspx#mid

But, if I pass the same anchor-bookmark(#) along with any querystring in my URL then its NOT WORKING in IE. FF works fine.
EG: http://.../Test.aspx?a=b&c=d#mid

WHY is it not working with IE?

Answer 1

Bug. RFC3986 shows it's perfectly OK: foo://example.com:8042/over/there?name=ferret#nose