So, I really like this laptop and I have no complaints about functionality, but after using it for the last few days, I think I may have a build quality issue: When I use the laptop in my lap and the fan comes on, I notice occasionally "clicking" occurring on the right side, near the top of the speaker grill. It almost sounds like what you would hear when metal expands/contracts when heated (like an oven). I can't reproduce it on demand, but if I just sit here and work with the laptop on my legs it will start doing it randomly. It is loud enough to be annoying. Anyone else have this issue? I also noticed (while trying to determine the source of the noise) that if I gently shake the laptop horizontal (with the lid closed) I can hear/feel something moving inside the body. I'm wondering if this is related to the clicking issue. I am quite happy with the machine overall. I'm just trying to determine if I should return this laptop for another one while in my 14 day window.