Lighting preview does not work in Blender 2.78? It seems that the OpenGL light previews are not available in the material preview mode (neither cycles nor internal edit: only in cycles) with the most recent blender version.
Was this intended or is it a glitch on my side? I really miss this feature.

edit: here is an example of what I Mean:
It is not currently supported, it's a known limitation of the current system.

Cycles OpenGL material preview has vey limited functionality, until recently (before 2.78) it didn't even have proper texture preview

It is currently planned to be substancially improved for Blender 2.8 project with a new viewport rendering system supporting PBR and improved performance