Create a project with a couple of access and maintain roles
Create a couple of sections and add membership
In Rosters / Group Membership
Click on By Group select
Warn in log:
2011-03-07 12:50:37,577 WARN TP-Processor6 org.apache.myfaces.shared_impl.renderkit.html.HtmlGridRendererBase - PanelGrid roster_form:_idJsp15 has not enough children. Child count should be a multiple of the columns attribute.