well...it's one of two things my friend. either it's simply from molding the polymer...or we both have cracked guns...it appears that I have the EXACT same "marks" on my SD40 VE. i can see from your pics that you also have a "mark" on your trigger guard, which I have as well. I hope it's just manufacturing blemishes...if not...I guess we'll both be sending our first Smith's back... :-/