I have been running Burnt Droid (Froyo) on my EVO. I was doing a Titanium backup yesterday and the phone rebooted and then went into a boot loop. Ran many nand restores, sometimes could get it running and others not. After a day of playing, finally figured out it was a heat issue. If I took the battery out and let it sit for awhile, I could get it to run for awhile. Ran stock RUU to get ready to take back. Same issue. Took to Sprint and they said I needed to update to 2.2. Tried to convince them the lack of update had nothing to do with this. I updated reluctantly. My only hope is new device will not be updated. I am so tired of dealing with support.