Sorry, this may be too late. But I had similar requirement and found a better way to do this:
{{#users.length}}
<ul>
{{#users}}
<li>{{.}}</li>
{{/users}}
</ul>
{{/users.length}}
{{^users.length}}
<p>No Users</p>
{{/users.length}}
Working sample here: http://jsfiddle.net/eSvdb/