The lighting on the side buttons could use a little tweaking to be more consistent, and the select button could be made a little taller (with the icon portion of it centered) so that the blank space between the text and button matches closer with the space between the 'restart campaign' text and button.
The lightning differences come from HDR reflections and while I agree that they dont quite match, rotating the background that gives the reflections would only create similar problems elsewhere. I just dont want to spend ages tweaking things to perfection, as much as that goes against my base instincts.
As for the select button, here we come to the fun joys of being restricted by the original FS2 interface. I can only move the highlighting part of the button a few pixels to any given direction, so that has to stay in place. Stretching the entire button vertically while leaving the highlighting area intact on the other hand would mean pushing the button frame thingy out of the image. That looks really dumb on the scroll buttons on the side as it is, and I'd like to avoid it if possible.
For the record, I think that whoever was responsible for the interface text placement was really sloppy. The texts are inconsistently placed and never where you'd expected them to be.