todoItemComponentWithEditing.hbs

<li class="{{if isCompleted 'completed'}}">
    {{#if isEditing}}
        {{input type="text" class="edit" value=title focus-out="acceptChanges"
        insert-newline="acceptChanges"}}
    {{else}}
        {{input type="checkbox" checked=isCompleted class="toggle"}}
        <label {{action "editTodo" on="doubleClick"}}>{{title}}</label><button class="destroy"></button>
    {{/if}}
</li>

Spotted a typo: value=title should be value=todo.title

^ What he said. All of the todo properties are missing their todo prefix

Ah, also {{title}} should be {{todo.title}} I believe in order to get this work correctly?