Texture packs downloaded from a multiplayer server do not install/activate.

When specifying a texture pack in the server.properties file on a server, when the client clicks "Yes" in the client to use the pack, it downloads the pack to the client in the "texturepacks-mp-cache" file as the zip file, but it does not install / activate the pack.

Disconnecting / reconnecting to the same server offers to download / install the pack again, but it will never install to the client.