[Radiant] JavaScript error in the admin interface

[Adam Craven]

Hello,

Got a slight problem. It doesn't break Radiant but we're trying to encourage
the use of RadiantCMS for our clients and the error causes difficulties.

When I edit a page in the admin interface and click the javascript 'more'
button to reach the slug/breadcrumb. 

I'm hit, figuratively, with this: 

URL bar reads: javascript:Element.toggle('extended-metadata',
'more-extended-metadata', 'less-extended-metadata')

Page opens up with this: [object HTMLDivElement]. 

If I click the back button, I return to the previous page and the slug is
open. So I can still edit the slug.

Any ideas what's going on?

Kind regards,

Adam Craven