Are you using a responsive theme that changes the layout based on screen resolution or window size? Assuming so: To see whether your zoom level is crossing the boundary between layouts, try zooming out (shrinking page content). You can do this using either: * Hold down the Command key on the keyboard and tap the - key * On the "3-bar" menu, find the - button (usually to the left of the 100% button) Does that make any difference? Do you want to post a link to the page for volunteers to check out?