FW: <o:p> is not recognized

> What does <o:p> is not recognized mean.  Are there items within the
> tools/options that I should click or unclick so I don't get this warning?
> Your help is much appreciated.  I downloaded the version for Windows XP.
> Thanks.
> 
> Stephanie Mears
> Accounting Supervisor
> Seaboard Corporation
> 9000 W. 67th Street
> Shawnee Mission, KS 66201
> phone:  (913) 676-8926
> fax:  (913) 671-6607
>