On sol 660 (June 15, 2014), Curiosity performed a series of short drives followed by MAHLI imaging of each of the wheels, to survey their condition. Here, the images have been sorted and the inter-cleat spaces numbered to make it easier to survey the locations of specific marks, tears, and punctures.
Sketch map of Curiosity wheel damage, sols 513 and 660 compared
A rough map of some of the tears and holes in Curiosity's wheels as revealed in two wheel surveys that Curiosity conducted with the MAHLI camera on sols 513 and 660, five months apart. Damage noted on sol 513 is marked in red; new marks as of sol 660 in purple. PLEASE NOTE this is a cartoon drawn by Emily Lakdawalla, not an official product of NASA and JPL. Any errors in it are mine.