Several LS members have bent these dog bone shaped brackets /arms. They are a weak point that can bend from either back dragging with the bucket tilted too vertical or running into an immovable object such as trying to push a tree over with the bucket. There are many links, here's one I found.
http://www.tractorbynet.com/forums/ls-tractor-owning-operating/314457-bending-metal-loader-2.html
I remember seeing another members replacement reinforced dog bones that had an extra vertical piece of heavy bar stock welded on for extra strength to prevent bending but couldn't find that link. If your loader is less than a year old they should be covered under warranty.
Its not just LS loaders, Mahindra and John Deere owners have bent the dog legs too. I think the loaders are made by Ameriquip but not sure.