If the shadows are broken - Shader bug fix

[onilink_]

Temporary, there is a fix to the shadows shader bug (>= 0.5.13b)
Go in Esc -> Graphics -> and check "Fix shadows bug"

Why it's not activated by default?
Because the render is not the same, that's why it's a temporary option.

Normal render (no shader bug): http://i.imgur.com/eEi3wQ0.png
Bug fixed, not normal render: http://i.imgur.com/zlUPszO.png

You can also use this option for fun, to have very deep shadows.