I am not seeing that at all. Just maybe 2 or 3 grids, around any sculpted terrain or where I place entities.
Now I am going to ask a dumb question: Are you on bld .022?, and what does you file verification tell you?
ok 2 questions then.
Also, sorry that this is happening to you.
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