Carolien, thank you for your answer!
But the problem is in "ribbingly"/"stepingly" effect of the picture. Position is Ok.
"Could you try with a standard template like rhuk_milkyway if you have the same problem?"
Yes, I did it already. And have the same problem
I find out that same things happens in "Highslide(Image only)" also. And this effect happens only with oversized pictures.I think, PhocaGallary try to change an image size, but do it not correctly in IE. Usually,the picture`s size smaller in IE than in Opera.