After looking through more rolls of pennies, nickels and dimes than I can count, I have discovered some errors that have me wondering how common they really are.
For pennies I see a fair number of die cracks from the edges of the Lincoln memorial to the edge.
For Nickles I have found the same but mainly from the left bottom of the building and on newer nickels since 2007, lumps on the face of Jefferson on the nose, chin and sometimes the eyebrows.
For Dimes it's the lumps on Roosevelt's face, usually around the chin, cheek and eye brows.
Just a situation of the stress of high points?