[G1 Android Development] kjdiehl:
For those of you with the <android.process.acore stopped unexpectedly> force close error, possibly related to Advanced Launcher.

I've been using AL since before Cyanogen included in his rom, and then continued using it after he removed it, and Ive been getting the acore errors for probably about as long. It never occurred to me that they might be connected, but who knows.

For the acore errors, it tended to crop up every other new rom version install or so, usually after using the rom for a week or two. The way to fix it was to WIPE. (If I tried re-flashing without wiping, I could sometimes get a day of use out of the phone before the acore crashes would return.) I know it seems like you can't do anything while it's acore crashing, but you can if you're fast enough. Press the Force Close button and then, as the error window is disappearing, immediately press and hold the Power button, (or try the 3-fingered salute: Call+Menu+Power). The reboot menu should display, but the acore message will probably flash over it. Hit Force Close again, and then quickly press the Reboot button. Then, as usual, as soon as the phone turns off, but before the G1 screen loads, press and hold the Home button to enter Recovery. Toggling through the acore Force Closes and the Reboot sequence may take several more tries than I've described above, but it seems like there's some sort of memory issue, because if you keep Force Closing the the acore over and over again, the time between Force Closes seems to increase minutely, eventually giving you just enough time to select the Reboot. Of course, worst case, you can always just battery pull.

Anyway, once in Recovery, you DO have to Wipe (your phone only, not your sdcard). I know, I know, it's a pain, but it's the ONLY way to fix the acore problems. Do NOT load a Nandroid backup. Once you've wiped, flash a rom which is one or two versions older than the one you got the force closes on. Boot the phone and rebuild all your settings and such from scratch. If you're lucky and smart, you'll have a Backup For Root Users or MyBackupPro backup files to restore most of your settings and data from. Google's cloud should take care of your Contacts and Calendar. And your apps should automatically be installed from the start by virtue of already being on your sdcard partition.

The above method worked consistently for me through several months of acore force close loops. I'd gain at least a couple weeks of use. I was using the Advanced Launcher standalone version, (so I could toggle back to the regular Launcher if I wanted,) through all that time, so maybe that's part of the problem. I have just stopped using AL and replaced and improved on its functionality with the fantastic Market app: AppsOrganizer, so maybe the acore problems are behind me.

Also, I know my above method may have contributed to the problem always returning by my not wiping and repartitioning my card. I never did this because I found it too difficult to figure out how to backup my ext3/4 partition. Now AmonRA's newest Recovery solves that problem, so I'll be doing my first COMPLETE WIPE of phone and sdcard in well over half a year. We'll see how it goes.

Hope my experiences provide some useful information for people.

Happy Holidays!