For whatever reason, since I got the information about the update and bees/new blocks being added, my cobblestone is changing to what the screenshot below shows. As you move toward it, it expands to the rest of it, but when you back away, it goes away and looks normal again. In some of the other texture packs, there's block of random colours showing up in doors, etc. . . Not sure what's going on but hopefully it's an easy fix.