You didnt miss anything, this is what I am trying to figure out. The lower fork sliders are the same part from 00-current. In 08, the axle bearing changed from 1" to 25mm. Since the forks did not change when the axle did, an 08-10 axle should fit any fork from 00-current. Can anyone tell me if the axle has a slightly different diameter where the forks mount vs the shaft that slides through the bearings. Swapping out the bearings was my first thought, like you mentioned, but when I noticed the forks are the same part I thought it might be easier to switch axles and use the spacers from the 08-current to make sure the disks were in line with the calipers.
OK - I just ran out to the barn. The front axle is stepped in 3 different diameters. Its about 3/4" on the threaded end where it slides through the left side fork, then 1" in the center portion, and +/- 1 1/8" at the butt end where the right side fork clamps the axle. I am going to guess that the 08-10 axle is similar in design with a 25mm center section.