Black textures appear on blocks at random. They donot appear on items,or skins, neither is water or chests, but most everything else appears black. I do not have a way to reproduce this,because I don't have to do anything for it to happen. The textures load normally,then at random everything goes black.except the few I listed. This has happened every time I tried to play 1.7.2 Single Player Survival and Creative. Multiplayer Survival and Creative. It seemed when I selected my default resource pack it reloaded the textures and occasionally they would be fixed for maybe ten seconds, but I don't think that was why they came back. I wish I had a way to reproduce this, but all I have to do is play 1.7.2 for it to happen. Minecraft has been flawless for the last 2 years on my system so this is strange. So I will include screenshots.

I removed all resource packs from my folder this is definitely default. just in case someone wanted to suggest otherwise.