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An Apple Store should replace that for free, pending that it isn't determined to be user caused.
 
that this will cause a safety issue. Would Apple replace this? I still have AppleCare.

Yes, they would.

I have seen neurotic individuals in uproar over professed problems, many of which tend to be ostensible exaggerations and, for some, magnifications of obsessive compulsive behavior; still, Apple tends to humor them.

Once, a man went on & on about his flickering Apple Cinema Display. He yelled over & over "See! Don't you see it?! It's flickering!". A fleeting audience, which included myself, had formed around the commotion, and we all silently agreed with standard looks of bemusement: there was no flickering. Needless to say, he had his display replaced almost immediately by an all-too understanding Apple employee.
 

That program is specific to the "T" shaped adapters, but if you have a warranty and it's clearly not a dog bite or some ridiculously obvious user error, I would wager you'd be more than fine for a replacement.

Luckily I just replaced my "T" adapter last week due to the class action settlement that the quoted support page is based on. Free stuff out of warranty, woo!
 
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