On Machine A, before the upgrade to Office SP1, it was
frequently necessary to restart Outlook in order to open
existing contacts (using a custom form), or sometimes they
would open but without the custom form.  That issue seems
to be resolved, except that sometimes the same problems
comes up with the custom form for phone messages.  The
same custom form for phone messages is used in multiple
folders.  Sometimes one of the folder will work but not
the other, and sometimes both display the same issue that
the Contacts using their custom form used to display.  I
also set the ForceFormReload key in the registry at about
the same time.

On Machine B, sometimes new contacts cannot be created (on
Computer B) due to a problem with the custom form and
sometimes when a contact that uses a custom form is
opened, it is opened without the custom form.

Most of the time, everything works but these problems do
crop up frequently.  There are many problems but they are
usually intermittent.

Machine A:
Athlon 950MHz, 512MB RAM
Windows 2003 SBS, Office 2003 SP1, Exchange Server 2003,
other user programs.  Used by a secretary.

Machine B:
Windows XP Pro, Office 2003, other user programs.

Do you have any advice for what I might try?  Clearing the
cache usually helps, but only temporarily.  The custom
forms are kept in an Organizational Folder and nowhere
else.  The custom forms have no custom VBS at all.  There
are also no custom controls on the custom forms.