my resolution is 1152x864 - from the looks of it, he is probably working with 800x600.

Could there be a different (the second image) inserted in the
"edit style properties"- category strip background colour section?

Just wondering, 'cause I remember I had a similar problem, but cannot quite recall what I had done wrong, and even less how I fixed it.

Could it be that the background image (the middle image of the three used) is set to a fixed width, according to what he sees on his screen, and not to a (100%) percentage? - thus causing the ghost image to make up for the difference?

nope im on 1024x 768 also and it looks great here

im gonna try to make it one image right now its left and right and center background

ok ok i see the board expands with my fav on it looks great and with them of its messed up ok ill fix that and make it one set size or should i not make it set?

now it works for me flawlessly

ok great now i just need to do buttons and some more work on the skin