Just did a semi-successful 3.4 firmware update to my DXG. I tried the update for KF8, but it is not working. Here are what I did. Hopefully some expert can fix the problem.
1) did 3.2.1 update with Yifan's instructions/tools.
2) did 3.3 update according to the
link. This one may be an incomplete update.
3) downloaded 3.4 file from Amazon and unpacked it by kindletool. Deleted the patchs of fb.modes, webkit library and kernel. Repack the whole things into a new bin file. followed normal update.
At least the firmware version shows "3.4"
Settings of parental control, voice guide, etc are there. Font rendering is more like K4's. PDF contrast can be adjusted.