How many miles/years since the bushings were replaced? I see a lot of forks that have leaking seals, and when I go to change them the bushings are wore. That could allow the fork to move forward/backward and cause excessive wear to the seals.
Another thing on conventional forks is to ensure the seals are well greased. Even as periodic maintenance, you can pop the dust seals with a small screwdriver, chisel or other thin edge tool; clean the top of the oil seal and apply new grease. It often cuts down on stiction as well, and can help keep your oil seals going well for a long time to come.