These are the 3 most popular "I Don't Really Care" email replies I get back from coworkers,  regardless of the question or issue.  Words never seem to fail me when I receive these cut and paste replies.  I'm pretty sure I have them all figured out.  They aren't fooling me.  I will briefly try to explain each one to you.

1. Thanks for the update - This first one basically implies that you are aware of my concern or issue, and that you are currently looking into it, You replied so I should just be happy. What it really means: That You really don't care about this at all.

2. Keep me posted - This gem basically says that you are still in the loop, but that it's not your responsibility. What it really means:  You really don't give a rat's ass about this issue, but it also shows your concern so just in case upper management needs to focus blame, you are off the hook.

3. Sounds good to me - This basically says that you have no idea what I am talking about, but since I seem to know what the solution is, have at it. What it really means: This removes all blame from you (sender), because basically you are just saying that it "sounds good", not full approval, it leaves squiggle room for the sender to blame elsewhere me (receiver).

I'm filing this under ramblings, because well I am rambling.