Appears to be fixed as of 13w43a, with the introduction of the Roofed Oak species! 😃
Original report follows:
Old bug report
The 2x2 Spruce that spawn in Covered Forest biomes use Oak leaves instead of Spruce leaves.
ie.
They look like Oak leaves.
Pick block gives Oak leaves.
They drop Oak saplings and Apples.
Regular spruce are fine, afaik.
Comments 6
Well, that was intended to happen since Mojang resisted to add new trees. New combinations, which are sometimes strange...
This is probably intended, I think they use spruce wood to make them darker (and the biome coloring takes care of the leaves).
Confirmed.