Changing skin in a sever will make everything go black

By Server, do you mean Featured Server (Cubecraft, Hive), multiplayer, or Realms?

Hive

Thank you for your report!
However, this issue is Invalid.

Unfortunately we don't accept issues related to External Servers here on the bug tracker, but please add more details if you think this also affects multiplayer over Realms, LAN, or XBL.

I'd suggest contacting the server owner directly or seeking help on the Minecraft forums.

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It happens to all severs

this bug came out in the new update Mojang loves having a big bug problem every update