Everytime I attempt to put a texture/resourcepack in the resourcepack folder (leads me there when pressing the ''open resource pack folder''), whetever updated or not, it doesn't show up. My friend has this too, same operating systems. Restarting 1.6 prerelease does not resolve this. (Hopefully this just has something to do with the new launcher and file changes)
Duplicate of MC-17856, please use the search function to see if your bug has already been submitted. Currently over 57% of tickets are being closed as duplicate.
In this case, please attach the resource pack to MC-17856.