Non-bug as such: I consider this an oversight in the game, more than a bug.
With 1.7.x we now have 6 different types of trees and wood.
When crafting:
- Wooden Door
- Wooden Fence Post
- Wooden Fence Gate
- Wooden Sign
- Ladder
All of the above only exist in the Oak Plank texture. There are now 5 other Plank textures, which could easily be used for these specific items/blocks aswell. The choice of source planks, would decide which texture the finished product should show. Fill in the recipe with random / mixed planks would produce the default Oak texture on the finished product.