Hm I hadn't tested wool. The door on my castle didn't burn as well, or the new hatch. Wooden steps or the bridge made of wood blocks and fencing did. Maybe I'll put another wood wall somewhere else and see what happens. After all, my forest is still there, and it's beside enclosed burning netherrack torches.
Another fun thing I just learned today, water destroys minetrack ramps and curves.
Accidently had a spill near the top of a ramp to my mine (that was slated to be removed anyway)....I picked up the water quick, but the wave went to the bottom and wiped every track out.