I have four objects (planes) that I have worked on, and I applied image textures, etc., and they display OK in the wireframe/solid/render views, but for some reason I now can't select them, and they aren't even showing in the outliner at all (they still show if I hide all the items in the outliner).
Any ideas? Is it something dumb that I've clicked?
I am using Blender 2.76b.