Multiple Fades (FadeIn, FadeOut, FadeTo) become jittered

Multiple Fades (FadeIn, FadeOut, FadeTo) become jittered

I have a galley of 9 images in a row. Each has the class '.galleryitem', and when mouseover any of these, I want the current item to remain 100% visible, but the other 8 items to fade to 50% transparency.

I use this code:
$('.galleryitem').live('mouseover',function(){
   $('.galleryitem').stop().fadeTo(400,.5);
   $(this).stop().fadeTo(0,1);
});

$('.galleryitem').live('mouseout',function(){
    $('.galleryitem').stop().fadeTo(400,1);
});


This works fine (although I'm not sure if the second line in the mouseover function is best practice), but after rolling over a few images, they all start to fade very jittery. Almost like something is clogging down the page, like bad garbage collection of sorts.

Does anyone know of a solution to this?
Thanks kindly