Is it just me, or is there something funny going on with buying LX-operated tickets through the website? I've been trying for the last day to purchase a ticket for LHR-ZRH-NRT. I can get to the final purchase page, but after hitting 'Purchase', I get

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We’re sorry, but united.com was unable to complete your request. Please try later or contact united.com Support in the U.S. and Canada at 1-800-396-1751; the U.K. at 0800 028 5003; elsewhere use the local phone number.

Reference your confirmation number:
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and there is no confirmation number. Yesterday when I tried to call in the purchase, I was quoted a Q fare that was 3 times the cost of the ticket online. Today when I called in, I was told that united.com can only sell me a ticket operated by UA or LH ?!