In the clothing stats it shows now also the letter "D" ?
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It means that you got it from a dead body; it gives the colonist that wears it a negative mood modifier.
As FlyingTurtle says, "dead man's apparel" is a new feature for A16, and any such apparel is marked with a letter "D" to distinguish them apart. So a new feature, not a bug.
I will close this thread now as a non-bug.