One of my colleagues noted that they no longer could see the layers information in the Layers Drop down box when selecting objects.
The image above shows this issue, the object is on a differing layer to that shown, the Layers Drop down only shows the current layer.
In order to fix this the system variable PICKFIRST needs to be set to 1, which should be the default for this variable. Sometimes if AutoCAD crashes this seems to be reset to 0. Now when the object is selected it should display the layer information in the Layers Drop down.