When a redstone torch is powered and aimed at with the game's crosshairs, the hitbox visually "dances" back and forth. When the torch is burnt out, the hitbox stays in place like it should and has in previous versions. I don't know if this glitch exists in earlier versions or not.
Steps to reproduce:
1. Place a redstone torch.
2. Put your crosshairs over it.
3. Watch the hitbox "dance" back and forth.
Here is a Youtube video of this glitch being demonstrated. I tried to attach the video file to this bug report, but it was 2 megabytes too large to be attached. The URL for it is:
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Cannot reproduce in your version.
Duplicate of/Relates to MC-6532
These are the screenshots I took. The ones that don't have the messed up hitbox visible are the ones that were in between the flashes of abnormality in the pattern of the glitch. That pattern is:
normal...messed up... normal... messed up..., etc.