funny glitch in slider.

Hey yall Im finishing up my uncles site... fritzhoffmann.com

when you click on the pictures button in the nav the slider glitches. I didn't write the slider script so I know if this is something in the jQuery or what.

any ideas would be awesome! ty

seems to work ok to me.

but what's the slider and what's the glitch?

sorry not slider, just the gallery, it just loads funny, not as smooth as Id like