Heading to "Far Lands", when either the X or the Z coordinate gets greater than 8388607 (0x7FFFFF) or less than -8388608, the flame of torches, normal or redstone, is displaced by half block on the axis of this coordinate.

This can be reproduced by placing a torch at 8388608,?,0 (or greater).

See included screenshot:

• the torches to the left (on 8388607 and less) are OK;
• the one being looked at (on 8388608) has its flame to the left
• the ones to the right (8388609) have the flame to the right

I only tested this in creative mode, but I believe this will happen in all modes.