sorry to dig this up but my '06 36RC2 Talas fork was slowly losing travel. I was down to 142-145mm or so. I released all the air and unscrewed the schrader valve using a valve core wrench and cycled the fork back and forth several times. Then, I extended the fork to full travel (it measured 150mm with no air and me forcing it fully extended) and installed the valve core. I then inflated the fork for my weight kind of pulling the fork extended as I inflated and now it's back to the full 150mm. It seems to be holding that travel now as well.
I have no idea why that worked, but it seemed like there was vacuum pressure present in the fork that was compressing the fork, thus decreasing the travel. With such a low pressure required for that fork, it wouldn't take too much vacuum to start acting on that low pressure in the reverse direction.
Again, I have no real idea what's going on but if you're losing travel, it's a 5 minute process to see if this will work for you.