GLSL cube environment map reflection shader problem

Here is the bug that I am experiencing with my GLSL cube environment mapping shader. Notice the distortions when I zoom in and out of the plane. See

Kyle the Krankin DJ

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my humps remix

this vidoe is better than the orginal !express# !metadata#!version#v1.0.r291!/version#!format#1.001!

the past

/graffiti.swf" type="BorderContent"#!metadata# !matrix#!a#0.85!/a#!b#0!/

remix

ok well from the (non remix of this movie u guys were probly yawning and fawling asleep well i hhelped a little !express# !metadata#!

ultimate stunts

!!!!!!!!!!...skateboard skate matrix the anthem stunts ultimate bike DJ twisty NL music jumpstyle kitesurfen BMX tricks motorcross

My Proto matrix rail *FOR SALE*

i showed you in the video... exept for the outcast pump. But i explained everything....SALE paintball proto matrix rail guns etek ego