Action Items Not Displaying

Here's an issue that I've seen a few times - the Reminders portal section shows a count of one or more action items assigned to a user, but when you drill into the Action Items portal section no action items display.  The solution is to be sure that any workflows with User Action or Approval tasks use an associated My Profile record for the assignment, not a triPeople record.  The out-of-box Action Items portal section (sysActionItems) only shows action items associated to a My Profile record.