My G1 had been having major force close issues with pretty much every app. It would take 90 second for the wallpaper to appear and then another 30-45 for all icons and widgets to appear on the home screen. And orientation had stopped working. All of this was getting frustrating. I had about 8MB free on my internal memory (just above the persistent notification threshold). I cleared it out to 16MB but no change. So I called Customer Care (CC). I got some great info I thought I would share. The G1 needs 20-25 MB of free internal memory or things go haywire. My CC rep reported phone ringing issues (which I had been having) data disappearing and more. I mentioned how this wasn't documented and she agreed. The only option I had was to wipe the phone. (There are many threads on how to do this, and the steps to take prior, so as to not lose everything.) I have since been using the phone with no issue, everything is working and I only uploaded essentials and sit at about 40MB free at the moment. It was a pain to re-associate ringtones and other small personalizations but many things returned as expected. I hope this helps some folks who are running their phone to capacity like I was and growing frustrated. I also hope we see bigger memory, stronger processors and the ability to use the card. I do use ASTRO which was a lifesaver in this wipe and reboot. Hope this helps some people.