Extremely minor thing, but the top shadow of the script editor editbox seems to cover the top of the 'tab' box outline. I'm sure the aim is to hide the tab box completely (which it does), but by covering the very top of the tab box outline (the white shadow) it creates a whole different visual look (no longer looks correctly 3d). Not sure if or how this may or may not affect windows themes. Maybe move the editbox down a pixel or two to reveal the top of the tab box and maintain the 3d feel?

I think the 3d border around the editbox control should be removed, that way the tabs can flow right into the editbox and look like real tabs..

other than that, I'm pretty sure the effect is intentional.