I got my new k2i several days ago, with 2.3.3 firmware pre-installed.
I downloaded 2.5.2 update package from Amazon website and tried to update it manually, but the updating process stopped at "stage 1 of 3" with error code U006, after reboot, the firmware version became 2.3.4.
I didn't install any hacks before update, totally untouched.
After that, by enabling debug mode and dumping messages, I found the error line:
ota_install: C defatchatchinfo="/opt/amazon/ebook/config/browser_prefs":checksum failure
Because I didn't modify the file at all, there should have no conflicts between them.
I tried again and again(including reset to the factory defaults), nothing changed, same error.
I have no idea why 2.5.2 update can't accept files from its own.
Have you guys figured out the solution? Dose replacing the browser_prefs file works?