>I placed a grid on the form, set its visible to .f. and made it small so I could continue to work with other components on the page.

Have you thought of using a pageframe with tabs, then you wouldn't need to resize the grid.

>Question: How can something be a Foxpro error on 1 machine and run perfectly on another? I can protect myself from arbitrary errors of this type.

It is really bizarre isn't it. Video drivers are the usual culprits.