Jquery SlideUp SlideDown - not fluid or smooth when is applied more then 1 div element with css3 box-shadow - why?

Question

Hello all,

What can we do in order to solve this issue. We are on the last Jquery using slideUp and slideDown on several div elements. If we have one, all runs smooth and fluid. If we have more then one, all effects are not at all smooth. If we disable box-shadow, all works as expected.

So, the issue must be the usage of box-shadow + slideUp and slideDown;

As anyone experience such an issue with those two? If so, what has been done in order to solve it?

Thanks a lot, MEM