I keep getting THE .ASS ERROR

[WARNING] +media has non-uniform node scale, x-axis value exported.

Export Finished.
0 errors, 1 warnings

Thats the error i keep getting when i try to make a water plane, but i have no idea what it means, plz help me. If you need more info (on my error) just ask me.

THANKS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

P.S. I still get the mooning pic, is that normal, i thought they recalled to get rid of it?????