I have a vertical navigation pulled right, outside of it's container with a negative margin. The text flows appropriately...etc.
The trouble I'm running into, is with the fieldset on my forms. I have a 69px right margin on the fieldset to accommodate for the right floated nav. In Firefox, this margin seems to be calculated from the right edge of the container (#content) as I expected. Safari appears to be referencing the edge of the nav instead.
It's easier if you view the site. Here's the page that is most distinct:
What's going on here? How can I fix it so that Safari behaves like FF?