Yes thank you, this has been reported, it is the way the shadows are rendering. You can turn shadows down a bit to 50, and it is not so distracting, This is being worked on. Sorry you are having this issue.
Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz, 2400 Mhz, 4 Core(s), 4 Logical Processor(s), 8gb RAM, Nvidia gtx660, Windows 7 Pro 64bit