Using Silk Touch on:

• Canopy Tree Wood
• Mangrove Wood
• Darkwood Wood
  Returns Twilight Oak Wood.

Using Silk Touch on:

• Transwood
• Minewood
• Sortingwood
  Returns Timewood.

Using Silk Touch on a tool other than Shears on:

• Twilight Oak Leaves
• Canopy Tree Leaves
• Mangrove Leaves
• Rainbow Oak Leaves
  Returns tile.TFLeaves.[number].name
  [number] being different depending on which leaves.

Using Silk Touch on:

• Nagastone Head
• Nagastone
  Returns tile.TFNagastone.[number].name
  [number] being different depending on which block.

Using Silk Touch on a tool other than Shears on:

• Timewood Leaves
• Leaves of Transformation
• Miner's Leaves
• Sorting Leaves
  Returns tile.TFMagicLeaves.[number].name
  [number] being different depending on which leaves.

Using Silk Touch on:

• Stronghold Shield
  Gives the block without texture.

Using Silk Touch on:

• Trophy Pedestal
  Returns tile.TFTrophyPedestal.1.name

Using Silk Touch on a tool other than Shears on:

• Thorn Leaves
• Beanstalk Leaves
  Returns tile.TFLeaves2.[number].name
  [number] being different depending on which leaves.

Harvesting:

• Violet Castle Door
• Pink Castle Door
• Blue Castle Door
  Returns Yellow Castle Door.
  See issue: #415

Encased Smoker/Fire Jet are treated as stone harvestability (should be wood) and have the breaking particles of Stone.

Block of Arctic Fur doesn't break faster with Shears.

Forge Version: 23.14.2.2641
Twilight Forest Version: 3.6.372

Tested this again in the latest build. There are still a few issues (some that I am uncertain about, but I will report them anyway)

Using Silk Touch on a tool other than Shears on:

• Twilight Oak Leaves
• Canopy Tree Leaves
• Mangrove Leaves
• Rainbow Oak Leaves
  Returns nothing

Using Silk Touch on:

• Nagastone Head
• Nagastone
  Returns nothing

Using Silk Touch on a tool other than Shears on:

• Timewood Leaves
• Leaves of Transformation
• Miner's Leaves
• Sorting Leaves
  Returns nothing. I assume this is intentional?

Using Silk Touch on:

• Stronghold Shield
  Returns nothing. I assume this is intentional?

Using Silk Touch on:

• Trophy Pedestal
  Returns nothing. Can be harvested without Silk Touch

Using Silk Touch on a tool other than Shears on:

• Thorn Leaves
• Beanstalk Leaves
  Returns nothing

Encased Smoker/Fire Jet are treated as stone harvestability (should be wood) and have the breaking particles of Stone.

Block of Arctic Fur doesn't break faster with Shears.

BONUS ROUND: Breaking Beanstalk Leaves may return Magic Beans, but untextured.

Everything here seems to have been solved by now save the fire jets and arctic fur but I just fixed these in 92336f4 and cbcbe7f respectively.

For posterity, will add castle pillar blocks - fixed by 6c14397.