Warranty wise, what I got from Oakley HQ, was if they do not have the parts, Which is most cases they don't, they will keep the Xmetal and offer you 30% off any current like items. If you choose not to do anything, they will charge you to ship your Xmetal back to you with nothing done about the issue. I think we all know what to do, SEND BACK please.
Its too bad we couldn't just buy Oakley/Lux off and out of their X metal patents and start making a new line. Sub contract the lenses from them.