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It's only Wednesday, but this is the clear frontrunner. From today's Times:

The cover photograph in The Times Magazine on Sunday rendered colors incorrectly for the jacket, shirt and tie worn by Mark Warner, the former Virginia governor who is a possible candidate for the presidency. The jacket was charcoal, not maroon; the shirt was light blue, not pink; the tie was dark blue with stripes, not maroon.

The Times's policy rules out alteration of photographs that depict actual news scenes and, even in a contrived illustration, requires acknowledgment in a credit. In this case, the film that was used can cause colors to shift, and the processing altered them further; the change escaped notice because of a misunderstanding by the editors.

Also, Warner's teeth have not been capped and whitened, his lower lip isn't doing that weird thing, and he doesn't actually give off that smarmy politician vibe that made you turn over the magazine on your coffee table so you didn't have to keep looking at him. It's all just a misunderstanding.

Corrections [NYT]
The New York Times Magazine [NYT]