I don't know what's causing this. See the picture below.
Note: this is a world exported from the previous snapshot.
MC-57807
Item frames are dark
Resolved
Duplicate
1
Joakim Andersson
(Unassigned)
Unconfirmed
Minecraft 14w25a
Retrieved
Confirmed. Item frames use a wood texture that is darker than either the spruce or dark oak textures.