I am creating a vitrine with the slide effect, but the effect is not working correctly.

I tested with other effects, but only worked correctly is a fade.

I left two simple examples, a slide and a fade to verify the error.

FADE DEMO:

Tested in browsers Google Chrome, Firefox and IE and is working normally.

http://jsfiddle.net/rafacharkman/EG3FS/16/

SLIDE DEMO:

Tested in browsers Google Chrome, Firefox and IE and the only effect that is not working normally.

http://jsfiddle.net/rafacharkman/ZJZMP/5/