The bug
This bug is best seen in the half-full armour icon were 1 black pixel has shifted to the side (see red squares in attachment),which corresponds to the full icon (see bleu square in attachment).
Original description:
If you have an odd number of armor points, the half armor-icon is missing the inner corner pixel (underneath the arms in the dark grey area). Also the white pixel that represents sort of a shine is moved 1 pixel to the side.
The full and empty icons do have this pixel (darker grey when full, black when empty).
This may affect more versions, but my computer can't handle looking for it.