Blender quite hard by doing things that normal user
wouldn't do, because they are kinda like useless. But
they reveal few tiny bugs.
in the 'material button' -> 'texture panel'
button between 'clear' and 'auto-name' is just for
knowing how many users of this texture or also for
making it 'single user' (cause in all releases
pushing it doesn't changed anything, but in latest
release tooltip saying '...make single...' ,but it's