Operating system and graphics card
Short description of error
This bug is active for material and rendered shading modes, in render result too.
1.Delete cube, add plane, add material to plane
2.Add normal map texture to material, select 'Generated' texture coordinates
3.Go to "object data" region, and try to add and delete UV-map - we will see change shading
This bug is active for all modes(object, edit, vertex paint, weight paint, texture paint, hair brush(if we have hair on object))
Exact steps for others to reproduce the error
Open file, try to add and delete UV map - we will see change shading
Repeat for edit, object, sculpt, wertex,texture,weight paint modes. Add hair, go to hair brush mode, repeat it.
Adn we will see unneed change shading in all this modes.