I noticed several of the highways around Crater Lake, Oregon had disappeared. http://www.openstreetmap.org/?lat=42.559&lon=-122.813&zoom=11&layers=M
A quick look at the history of remaining points ('h' with Potlatch 1, no idea if there's an easy way to do this elsewhere) showed the licensing redaction bot removed them. So I added the highways back using the remaining points. That was slow going work and it really didn't make me feel like I'd added much. At least I was able to add a few extra details along the way (bridges).
Which reminds me, JOSM has an annoying habit of suddenly not adding ways between new points; the most recent tested version seems to be the worst yet.
Anyway, the whole experience made me wish the redaction bot just went back to the original TIGER import.