Grafik Glitch: Rectangle around plane

[Nephris]

Hi folks,
since the past both RC patches i got the following glitch



Anyone else with that irritations?
Cache got already deleted.



My System:
I7 920 @3,99Ghz
Win7 64
8Gb Ram
HD6970 Catalyst 11.11

[core]
RandSeed = 0
TexQual=2
TexFlags.PolygonStipple=0
Shadows=1
SpecularLight=2
DiffuseLight=2
DynamicalLights=1
MeshDetail=2
LandShading=2
LandDetails=1
Sky=3
Forest=2
VisibilityDistance=3
LandGeom=2
DrawCollisions=1
Water=-1
Effects=2
EffFlags.Light=1
EffFlags.SpriteRender=0
Grass=3
CordEffect=1
UseFog=0
UseLandCube=1
UseLandConnectedObject=1
LinearObjectManager=1
Roads=1
Sun=1
Clouds=1
EffFlags.LightSpritesProj=1
ShadowMapSize=5
TexFlags.AsyncLoad=1
TexFlags.ShowTexture=0
SimpleMesh.SWTransform=0
SimpleMesh.QuadTreeClip=1
SimpleMesh.InstancingHW=1
EffFlags.LightContextSprites=1
CloudsFlags.Detailed=1
TexFlags.CreateHDR=1
Decals=2
EffFlags.SWLight=0
TexFlags.CockpitOnePass=0
MegaTexture=0
TexFlags.Reflection=0
RenderTargetQual=3
MSAA=2
MeshStatics=2
MeshStaticsDetail=3
SimpleMesh.QTNoCompose=0
MeshFirstLod=0
MeshShowLod=0
SpawnHumans=1
TexFlags.SSAO=0
TexFlags.VSync=1