I recently installed Office 12 Standard with Outlook 2007.  I copied my old
pst file to the default location.  when I start Outlook, the message "there
was a problem reading one or more of your reminder. Some reminders may not
appear." displays over the system tray.  In the Outlook today view there is a
pane that displays, "the operation failed.  An object could not be found."

I have set the properties of the personal folder to show the reminders.  I
have executed the cleanreminders and resetfolders as described in kb article
286166.  Since running these fixes reminders still do not fire.  Also I no
longer see the option to show the reminders in the properties of the personal
folder.