Rpg Maker Developers Group

so I'm using a custom window.png file, though this has occurred with the regular window.png.  On the right side of the window it creates a 1px gap that I can't get rid of.  I did not modify the dimensions of the file, simply recolored it.  All parts of the window are within its borders though the right side would logically always be inside its border since its the end of the image (I'd expect this if i overlapped the left side, which touches the fill portion of the window).  I've tried increasing the canvas size by 1px for the width but that didn't work.  nothing I do will get this to work so I can't line up the right side to be flush with other windows.  Here are some images to show what I'm talking about.

any help on the matter would be appreciative.  

as another bit of information, the window gap.png is of a battle scene.  to move the windows around I'm using Battle Window Customization  though there are no script conflicts and all it does is move the battle windows around

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