Forum OpenACS Development: Multiple hidden using form template

It seems that hidden widgets do not properly render multiple value like checkbox or multiselect.  So on "template::element create" it does not properly handles -values, while -value works fine.

Any advice how I can change this behaviour?

I would like to have something like this

<input type="hidden" name="foo" value="bar">
<input type="hidden" name="foo" value="barbar">