Form aligned differently between browsers

Can someone please shed some light on my alignment issues I’m having between Safari/Firefox.
Visit: FORM (http://www.goneislandforever.com/signup.html)
Notice my form is aligned in safari but not firefox…
I’m sure it has something to do with the absolute positioning but I need these to look the same across all browsers.

Any help is greatly appreciated!
Thanks

Ah I changed the divs position to relative and then used top/left parameters to put it in place. Seems to have worked.