Oh my gosh, I can't believe you're the first person to notice that! I'll have to go re render the Hearts card sets to fix that, but shouldn't take too long!! Thank you for pointing it out! Led me to notice a glitch in the render for one of the Isometric card sets as well!
Also, love the blackjack game! Even ran across the poor broken 7 of Hearts a few times heh. I'll get that fixed by the end of the evening!