Seems like they switched over at some point early production. When I emailed E3D they just said they changed the tool used to make it so there is some variance. I pointed them to the that pic and asked more questions around it and haven't heard back yet. I don't think they are doing a replacement. I know you can buy the newer style gear by itself for about $15 from filastruder. I guess if you are having issues, then contact them. Maybe they will work out a replacement. There are a lot of factors if having issues and many have had great success with the original profile. Tension and gear alignment accounts for a lot with the Titan. I wouldn't get too worried about it since e3d is pretty responsive to helping with issues. They also are coming out in June with a slight change in the idler lever to work better with the 3mm filament.