Plan - Problem to show progress information

I'm evaluating a scenario with defect work item type as top-level and tasks as execution items.

After simulate some defects and tasks, when I create a plan, defect's inline progress information isn't displayed when the're some children tasks with estimate and time spent values. The characters "--" keeps displayed.

P.S.: The group's ou plan's progress bar is displayed correctly. In addition, when progress bar is added to defect presentation, this information is displyed correctly too.

Any idea what is going wrong?

Tks in advance.

Adriano Farias.