--- Operating System, Graphics card ---
Windows7 64bit | FX2700M

--- Blender version with error, and version that worked ---
Blender 2.5 alpha1 - 2.68a

--- Short description of error ---
When toggling checkboxes for renderlayers in Outliner, it appears to control Environment, which has already got separate control, but cannot control the actual renderlayers toggling as expected.

--- Steps for others to reproduce the error (preferably based on attached .blend file) ---
Please see attached image. It seems existing from the very beginning since 2.5 alpha1. Thanks for checking.