[jQuery] (validate) block event Return

Hi,
I'm trying to use the plugin Validator (from
http://bassistance.de/jquery-plugins/jquery-plugin-validation/) WITH
JSONSuggestBox (see: http://tomcoote.co.uk/jQueryJSONSuggestBox.aspx).

But when I press Return on a searched item (JSONSuggestBox), the
validate plugin starts, instead of let the callback function runs
(that update an input hidden with the id of the item founded).

How can I run thgough this?

Vagner