I would be really curious to know what your replcement clips look like. Earlier posters said their Nikon replaced clips were gray and maybe sturdier.
The ones Nikon put in mine last month look almost identical to the originals, so I'm not convinced they upgraded the parts. Perhaps my new ones are ever so slightly darker in color, but not enough to convince me that they are made out of a new material. I can only see a difference under very bright lighting.
Scott Chapin Powder Springs, GA, USA Nikonians Team Member