Alignment problem when hovering over a button using onmouseenter

Hi, I found what seems to be a bug of some kind because the same script works fine in many other scenes. It has to be something else. What controls where the mouse is hovering over a button? It's working but is off on the Y axis by at least the buttons height.

I checked other working scenes to make sure the camera is the same, and that I built the buttons the same. Made them by zeroing out pixel insets for the guitexture and using transform only, to place the texture. I attach the script to make it a button. What can you do to effect NOT having the mouse over image when the mouse cursor IS over the image? How can I move it to align it back? Thanks in advance.

Code (CSharp):

1. public Texture2D button;
2. public Texture2D hoverOverButton;
3.  
4. void OnMouseEnter ()
5. {
6.  
7. guiTexture.texture = hoverOverButton;
8. }
9. void OnMouseExit()
10. {
11. guiTexture.texture = button;
12. }

 

I think I got it now. Was using a png with transparency by mistake.