Ok, I was workin on my texture pack and I switched to defualt and updated the stone.png in my texture pack, while still in the texture pack gui. I then switched back to my texture pack turned around and all the texture were messed up. Quite funny and I was able to re-create. I was also able to update the textures by updates blocks.
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Dude did you notice that I posted this glitch then you posted this glitch and then some other dude posted the glitch. all at almost the exact same time xD. But mine has a video so its better 🙂 LOL
Duplicate of MC-7627.

@Tim Anderson: But instead of attaching your video at the original ticket, you've created a duplicate...