well, I have done reinstalls alrady.
-Overheating. up to 180-190* F
-No burning. it gives errors.
-speaker buzzing
-can't develop apps
-running sluggish.
-cant connect to shared usb harddrive on network.
ALL fixed with lion on my current install.
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oh, and I copied the dmg to a flash drive then to my lion install, and it didn't work.
luckily i made 2 seperate lion installs. 1 on the external, and copied the original itunes 10.1.2.... :/