Transistion issues

Hi,

check out this: http://www.beforedawn.net/clients/stewartparvin/concept4

I am using the built in transition class to do the movement. I notice that when two things are clicked in quick succession the movement jitters and looks awful. Also when a menu button is clicked the little white line which appears next to it moves very slowly.

I assumed this was always the case but check out: http://www.ascamon.com/ there is loads of movement going on here but no jitters on my machine.

any ideas would be most appreciated.

thanks

ash