Dear Devs,
I have read this forum carefully, but unfortunately none of the suggested fixes worked for me. I have a Kindle 3 WiFi on Firmware 3.3 from UK and here is what happened:
1. Applied Jailbreak successfully a long time ago together with screensaver and font hacks. I was able to run custom code, so everything seemed alright to me.
2. Got the message from Amazon that they would cut me off from their service if I did not update to 3.4.1; update did not work automatically nor manually (U007 error).
3. Contacted Amazon Support and did a Factory Reset, which was a bad call that I still hate myself for

Now I'm stuck with a vanilla, though I think a part of the jailbreak must still be there somehow, from what I saw in the logfile.
4. I want to have my jailbroken Kindle back so bad, but no matter what I try (uninstall Jailbreak, install Jailbreak, recover linkjail directory), I always end up with error U007. I always do a hard reboot between each try, but nothing seems to
I have my log file attached log file, maybe there is something in it to point into the right direction.

a lot in advance for your help!