Hi Bryan,
I've tried duplicating here, but not getting any joy.
Perhaps you can tweak one of the examples to show the effect?
I suspect your issue may be more in the form than the browse, but it's hard to be sure.
BTW - you probably need the "Use JavaScript Styled button" to be on to use the JavaScript Icon - but
I don't think that's causing the problem.
What might cause the problem is if the browse itself contains some non-xhtml compliant code. That would "appear" as a form that won't close after "save" is pressed. You can use FireBug to see the xml returned by the browser after clicking on Save. (Console , open response, choose XML at the top of the response.)
cheers
Bruce