I've been seeing lines on my avatar's hands when using double layered skins for 1.8.1 as well as a pixel orientation bug.

The first attachment shows the bar when using the second layer from first person, while the next attachment shows it for both arms. This line also appears for the main layer on both arms.

The next attachments show the arm orientation on the left arm is 1 pixel shifted from the right arm. (both arms are supposed to be mirrored). For an easy look, the left arm outward side has 1 bar and the right arm outward side has 2 bars in the correct orientation.

This orientation problem is also shown on the main layer, as shown in the last picture. Take note the "+" on the left is shifted 1 pixel to the right (from the observer)

I first tried re installing the .minecraft folder, but the issue was still there.

I tried various skin editor sites and uploaded the skin template and the orientations were all correct. The problem only occur in game both in singleplayer and multiplayer.