In a similar vein, everyone knows about the Graig Nettles loop error on the 1969 cards, but did you notice that his picture also bleeds into his fellow rookie's shot? It's on both versions of the card, and the cropping error seems to be uncorrected.
1969 Topps #99.1 - Twins Rookie Stars (Danny Morris, Graig Nettles) (Error: Black Loop Above Twins)
Courtesy of COMC.com