RJS issues in ym4r


I am using the ym4r plugin, and have tried the traffic mash up example,
and everything there works great.

I then created a new rails project, and got this working with ym4r. My
problem is when I try to update the page using a .rjs file, it doesn't
render properly. In my view, I have the following piece of code: <%=
form_remote_tag(:url => {:action => :save}) %>

Then in my controller, the save function is simply:
def save
    @map = Variable.new("map")
Within ym4r, this simply assigns the javascript variable map (my GMap2
element) to the ruby var @map.

I then have this simple save.rjs file:
page << @map.clear_overlays
This should just clear the overlays that I have added to the map from
it. Pretty straight forward.

However, when I click on the button that submits the form to the save
action, I receive this in my browser:
try {
} catch (e) { alert('RJS error:\n\n' + e.toString());
alert('map.clearOverlays();'); throw e }

It seems like the javascript that is created is simply being output,
instead of actually being run. The other thing I noticed is that after
I click the button that calls the save function, my url becomes
http://localhost:3000/map/save, and not just http://localhost:3000/map
as I expect. In the traffic mash up example for ym4r, when the find
function is called, it is never appended to the end of the url as is
happening in my case.

I am including the default AJAX libraries ( <%= javascript_include_tag
:defaults %>).

Does anybody have any ideas as to what might be happening?