A strange Visual bug appears when i play Minecraft with the following video settings:

Graphics: Fast
Smooth Lighting: Maximum
3D Anaglyph: OFF
GUI Scale: Normal
Clouds: ON
Fullscreen: OFF
Mipmap Levels: OFF
Use VBOs: OFF
Render Distance: 16 chunks
Max Framerate: 30 fps
View Bobbing: ON
Brightness: Bright
Particles: All
Use VSync: ON
Alternate Blocks: ON

(I have attached an image if that helps)