Running Natty, I read: "The ubuntu-support-status command will print the exact status of your system."

I typed:

$ ubuntu-support-status
Traceback (most recent call last):
  File "/usr/bin/ubuntu-support-status", line 105, in <module>
    (still_supported, support_str) = get_maintenance_status(cache, pkg.name, support_tag)
  File "/usr/bin/ubuntu-support-status", line 37, in get_maintenance_status
    raise Exception("No date tag found")
Exception: No date tag found

Does someone know why can this happen. Could it be because is it running on a Mac. How can this be fixed?