I already posted this in the comments thread here:
https://forums.macrumors.com/threads/384167/
I've tried updating my jailbroken iPod touch 1.1.1 to 1.1.2 and the result is a crashloop.
It seems that the Springboard crashes just after startup, gets automatically relaunched, crashes again etc...
-> Doing a restore and using the backup results in the same crashloop as before.
-> Restoring without using the backup settings is working.
Conclusion:
Jailbroken 1.1.1 iPod touchs can be updated to 1.1.2 but you will lose the jailbreak, all applications and all settings completely.
https://forums.macrumors.com/threads/384167/
I've tried updating my jailbroken iPod touch 1.1.1 to 1.1.2 and the result is a crashloop.
It seems that the Springboard crashes just after startup, gets automatically relaunched, crashes again etc...
-> Doing a restore and using the backup results in the same crashloop as before.
-> Restoring without using the backup settings is working.
Conclusion:
Jailbroken 1.1.1 iPod touchs can be updated to 1.1.2 but you will lose the jailbreak, all applications and all settings completely.