Nicolas,
I don't have IE 6, but it works nicely on IE 7, as well as on Opera 9.64 (my main browser.)
It is elegant and clean and easy to navigate. And your photographs are lovely. I didn't see any "losers".
I think I remember that when I tried an earlier version of your site, I couldn't see an easy way to get back to the home page when I finished with a gallery. Now it seems easy, with "Back" and "Contact" up on the right. I would like to see a page of text, perhaps called "About Me", which tells us a little about yourself, your photography, and your goals.
Two tiny quibbles: On the vertical images the text at the top, giving location, date, and time, is often cut short. And the ad for "3D" looks a little tacky, but it may not be easy to remove it.
Beautiful work!
-Eric