the same, different bookmark

There is this web thing called default page.  The default is usually index.html, default.html, or default.htm

So if I have a URL like

http://www.nature.com/nature/multimedia/googleearth/index.html

I actually only need

http://www.nature.com/nature/multimedia/googleearth/

and it will work fine; it's essentially the same URL.

So who would ever go around bothering to cut out the index.html bit?
Err, me.
If it doesn't need to be there, I'm deleting it.

But this causes a bookmarking problem.  If I bookmark the above with the index.html, delicious happily locates 8 other bookmarkers.

If I bookmark it WITHOUT the index.html, there I am, all alone.

But surely this is fundamentally the exact same URL?  Am I asking too much of delicious to consider these two the same?