Of course it does. =)
Has debris that does not turn black and looks like it actually broke into pieces?
http://forum.blockland.us/index.php?topic=181317.0Can't do anything about it.
Use a texture that's the same color as the barrel, sure it'd appear brown even if the barrel is, say, green, but i believe brown wooden barrels are more common, but i can't say for sure
The barrel uses blank and black25 textures. As far as I know those (transparent ones) are the only ones that can be colored.
There's a problem with using textures that are not things like white, whiteCheck, gray25-75, red, black, blank, black25-75: artefacts of random colours appear.
I thought vehicle debris wasn't affected by the color shift and only the vehicle itself was?
Correct. The problem is if I use colored textures for the debris it's still only correct if the player decides to color the barrel with that same color. You want a purple barrel? Well tough luck, the debris is colored red.