Defect By DefaultApparently EVERY 5672 is going to do this by default, we'll only hear about it from those savvy enough to post in a thread and recognize it's a problem.
I talked to Acer's support (they speak English and seem to have a bit of an idea what they're doing)... they had never heard of the problem, and told me to take it back.
Now, I'm not the smartest guy in the world, but I managed to figure out that it was something that's basically inherently defective with all of the 5672's.
I was just at CompUSA, attempting an exchange, when I decided to try my luck at the floor model. Would you believe it... dingdong on start and thunk on shutdown.
The dingdong on start is caused by the Launch Manager program, labeled QTZGAcer in the startup (MSCONFIG) menu. Disabled it, and no more dingdongs on startup. Uninstall and reinstall failed... you can actually reinstall individual programs and drivers by hitting alt+f10 while the computer is running, and it'll pull up the windows version of their recovery tool. Looks like its just a program that is basically defective by default. After the uninstall and reinstall, I actually had double-ding-dong's on startup.
It's the program that shows the snazzy neon green volume level bar and the bluetooth/wlan enable/disable on the screen.
The shutdown think sound is a bigger problem. I never got the chance to isolate it, though it's something towards the bottom half of MSCONFIG in the default configuration (I already got through most of the top trying to figure out qtzgacer). I gave up, and bought an HP instead... but not before checking event viewer for any errors on their floor model. There were none.
I don't know why Acer would sell a product that is essentially defective by default... It's nothing major, but I'm enough of a nit-picking nerd that if a company is putting a product that's defective on the market, I won't buy it.
I'll be in the HP forums, should anything happen.