Oh, true. Singapore.. hmm.

No but really - I'm no expert, but a properly tensioned front wheel should not just randomly explode. and as far as I know front hubs don't randomly seize, either, not when they're set up correctly. This is, of course, assuming that you're sure that nothing got caught in your wheels. But if this is Shimano's fault (which I don't think it is), we're not talking warranty replacement, we're talking recall. I don't know enough from your post to make a conclusive and informed judgment, but I tend to suspect that something was definitely not set up properly.