while this isn't anything really serious, i thought i could at least report it, sorry if this is a known problem or anything...
the reflection of the sun on the water surface seems to be glitchy while the deferred rendering is activated.
please see for yourself in the following screenshots:
the clipping of the sun reflection in the third picture changes when you move the camera up and down, so it depends on the viewing angle, it gets less visible the lower the camera is.
i installed the official viewer to counter check: with deferred rendering and shadows ON, the water surface actually still looks exactly the same as with deferred rendering OFF (like on the first picture from cool vl viewer - with the bright glistening of the sunlight on the waves).
sheep out!