I'm having a problem with a search button, please take a look on the menu bar: http://lentzsteurel.com/happyenroll/ The button looks fine in most browsers except Safari and Chrome, where it jumps below the search box.
The class sf-search has no width. I would give it a fixed width (in CSS) with float:right. Now put both parts of the form into this sf-search box, one float:left and the other float:right