Opera browser + youtube embeds = trouble

Hi all!

i have problem on my site:

i added about ten posts with post type “video” to my blog.

every post contains embed code of youtube video.

all works fine when i opening the site using Chrome and Firefox, but i just noticed that my site displaying very strange in Opera
(i tryed different versions of Opera with the same effect).

Here is the link to my site:

http://www.4x4brest.com/cats/%D1%8D%D0%BA%D1%81%D1%82%D1%80%D0%B8%D0%BC/

is there a way to fix such trouble?

many thanx!