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Blu-ray Fix Downgrade –
I have a tutorial here, no files unfortanatly those you must find on your own.
There is a couple threads on posted dev_flash3 files these ARE the files you must get to fix blu-ray from downgrading. Also you must replace your xRegistry.sys
So If you are using ACID CFW, or any other edited xRegistry.sys then you must replace that with an original xRegistry.sys file.
The xRegistry.sys file can not have any debug settings enabled or blu-ray stops working. if you want to play around with that to see for yourself be my guest, I would personaly like these options enabled, but to play your blue ray you must be on a "nilla" xRegistry.sys
Find dev_flash3 for your region/make/model
Ftp over dev_flash3
Find Original stock xRegistry.sys
Ftp over dev_flash2/etc/xRegistry.sys
Reboot PS3 into Normal Mode
If you want to use awsome mount point manager, or another I believe you could map the xRegistry.sys to a new folder, so in your JB mode you could have a custom xRegistry.sys for use