For those not familiar, pinterest.com is a virtual pinboard that lets you share neat ideas and inspiration with friends and strangers. They do have some posted pin etiquette rules, but it doesn't cover my particular question. They can be found here for reference: http://pinterest.com/about/etiquette/
If you are familiar with pintrest and want to skip my explanation below, head to the ******.
So basically, you can view other peoples "pins", which are effectively pictures that are linked back to the source site. If you click on the picture, it takes you to the source site so you can see the context of the original image - often times this includes recipes or crafting/DIY instructions for whatever is pictured.
If you see a pin you like, you can "like" it. You can also "repin" it, which puts it on your board. When you repin something from another user, the pin credits and links to the other user in addition to linking to the site.
It looks like this:
CluelessBride via OriginalPinner
Repinned 1 hour ago from OriginalPinboardName
Tasty new recipe to try (caption)
Then if you click on OriginalPinner, it takes you to all of their pinboards. If you click on OrginalPinboardName it takes you to the original posters board containing the repinned image. If you click the image, it takes you to the webpage the image is on.
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So, here's my question. Sometimes I'll see something I like and click the image to visit the original site. In doing so, I will sometimes find another image that better captures what I love about whatever I'm investigating. So I'd rather pin the new image. But if I do that, it won't get credited back to the original pinner. This doesn't really bother me much if the original pinner is a stranger, but if it's a friend (and we are following each other), it seems odd. So should I use the original image, even though there is another one I like better? Or is it okay to use the new image? If I do use the new image, should I make mention of the original pinner in the comments section? Or would that be weird?
If specifics are helpful, here's the situation I'm in now (although this has come up before). Warning: it involves discussion of chocolates and cupcakes.
My friend pinned the first picture (a cupcake surrounded by chocolates) with the caption "Ferrero Rocher Cupcakes with Chocolate Ganache Frosting". I thought, mmmm tasty and clicked. Sure enough, a recipe! Score! But the really cool thing (to me)? You actually bake a chocolate inside the cupcake! I'd much rather pin the second picture (a cupcake cut in half) since it shows off the inside of the cupcake. I want to add this to my "Must Try Recipes" board, so I'm eager to read your responses!