When I add a resource pack to a world (using Resources.zip) it successfully loads, but there's a resource pack called "Server". It has a missing texture as a picture.

Looks like this was downloaded from a server you visited. Let them know to fix it.

edit: Nevermind.

Is this still an issue in the most recent versions (currently that is 1.10.2, or 16w42a) of Minecraft? If so, please update the affected versions and help us keeping this ticket updated from time to time. If you are the owner/reporter of this ticket, you can modify the affected version(s) yourself.