[anton85]

If I'm correct, then:

If you're used pandora unbricker, you got 1.50 without ID Storage.
Your keystate can bring to you 3.30 official FW.
But if you install clearly (without fixing 5th key) 3.30+ CFW you got brick, because CFW needs 1.50 5th key, not 3.30+ supported 5th key.

So xploit patch sets 5th correct key to use 3.30+ CFW.

Yesterday, I got brick on 3.52M33 while restoring nand dump without restoring ID Storage Keys, and my 5th key was for 3.30+ official fw.

Xploit patch makes correct thing, patching 5th key.

If you so need original 5th key - fix it yourself.