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Yep...go to your rack's page and then select 'Screenshot' under the 'Show' menu. If the screenshot view doesn't coincide with the actual page, refresh the screenshot. At that point, you should be able to refresh the forum post and see that it now matches the current state of the build. This isn't foolproof, though...sometimes it takes a bit more prodding, putting the forum post into 'edit' and back out again, etc. But the main problem comes from the rack's screenshot not matching the rack's actual page, so when posting racks always remember to make sure the screenshot is in sync before putting the post with the rack in question up.