I get the same but only with resolutions above stock (1024x800)... If you're using the the Resolution Fix, it just seems that settings above 1280x1024 seem to get the "funny" grid references... as soon as you reset it back they'll look fine
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GWX3.0 - SH3Commander - Thomsen's Sounds Pack - Manos Env Pro - Hitman's Optics - RB's UBoat Flags - Waterstream & Exhaust CombiMOD - Torpedo Damage Final - DiD
AMD Phenom II x6, 16GB DDR3, 2x NVidia GTX460 1GB, WIN7 64bit