It is reported that not all consoles lose Blu-Ray function after downgrade.

Lets start a list of what works and what doesn't. Try to include:

Your Machine:
Your Region:
What Dongle You Used:
What Hex You Used:
Firmware Downgraded From:
Firmware Downgraded To:
What .PUP File You Used:
Where Did You Get .PUP File From:
Does Your Blu-Ray Player Work For Films:

EXAMPLE ANSWERS
(actual test)

Your Machine: FAT 60GB
Your Region: PAL/EU
What Dongle You Used: MINIMUS 32 CLONE (TEENSY 1.0)
What Hex You Used: psgrade_ps3yes_at90usb162_16mhz
Firmware Downgraded From: 3.50
Firmware Downgraded To: 3.41
What .PUP File You Used: DGR.RAR From SENDSPACE
Where Did You Get .PUP File From: LINKED ABOVE - SENDSPACE
Does Your Blu-Ray Player Work For Films: YES