I get same screens as Bruno (without jQuery UI version) on Firefox 6. errata, change views are follows:
### File: views/default/index.html
{{extend 'layout.html'}}
{{=grid}}
### File: views/default/manage_tasks.html
{{extend 'layout.html'}}
{{=grid}}
### File: views/default/view_task.html
{{extend 'layout.html'}}
{{=task}}

