I'm with Ray in that overall I like the knife. I wouldn't criticize if it weren't asked for, and if somebody posted up that knife in the Totin' thread I'd probably comment on how nice it looks. Since you've asked for input for improvement...
To my eye that knife looks too chunky. It should be slimmed down quite a bit. It looks like it would be very heavy and bulky in the pocket. What are the dimensions of the knife?
Along the same lines as being too chunky, the blade stock looks really thick. Most slipjoint fans seem to like thin, slicy blades. What thickness stock are you using for your blade?
The satin finish on the bolster looks like it could be taken to a little finer of a finish. Whatever grit you used to obtain that shine, go one step finer. It looks more scratched than satin.
The screws in the covers look a little off. I can't tell in the pictures if the screws are flush or if they sit on top of the covers, but with the smooth ivory they should sit flush. Also, with just two screws on each side they should stay on the center line of the frame. The ones closest to the bolster look good, but the ones towards the butt are off-center. They're probably centered on the cover, but the curve of the frame makes them off-center to the knife. This can be fixed by having a third screw in the middle down towards the spring. I'm guessing you have a hidden pin there. Having that exposed would make the screw placement seem more symmetrical.
As I said earlier I like the knife quite a bit. The covers are just gorgeous. I also like the blade profile. It looks like it'd be extremely useful. The plunglines look nice and clean, at least on my screen. Overall, very nicely done.