I like a lot of others had the DC power jack problem and have not used this computer (I am on it now) for around 6 months due to the new motherboard doing the same thing.
After my daughter crushed the LCD on my Acer earlier this week by stepping on it, I decided to play around with this one again. I took the computer apart in about 30 minutes using the guide on this site, I took my soldering iron and added extra solder to all of the solder joints on top and on bottom for the jack. That seems to have done the trick as the computer now works and recharges the battery. It also no longer jiggles. I've decided that when I want to use this one I will unplug it and only plug it in to recharge the battery. I plan on selling it as soon as I get a replacement LCD for my other one. And for any of you that are not having palm rest shutdown issues, do yourself a favor and break off the side tabs on the "C" panel on the back. This will prevent it from happening in the first place.

If your motherboard is not cracked, it can be repaired in the same way easily. At least this is some hope for those who have been told they have $1500 door stops.