Flickering (flip effect)

[tmaximini]

Hi,
first of all thank you for this library, I like the ease of use and the effect it provides. I experience some kind of flickering though on the flip effect.
I don't know if it has something to do with my css or with my markup..
Here is a JS Fiddle that demonstrates the flickering: http://jsfiddle.net/6f5RF/1/
Any idea how to get rid of this ?

Thanks a lot...
Frank