There is the new on the official website:
Rebug 3.41E Beta v1.0.1 Incorrect PUP
January 6th, 2011
DO NOT INSTALL THIS FILE – IT HAS ‘unpkg’ MISTAKENLY LEFT IN THE ‘update_files.tar’.
File Name: REBUG_341_BETA_UPDATE_PUP_NO_JB_INSTALL.rar
RAR MD5: B1A5D962BDCFE03FD2BB1D32F359F9BB
PUP MD5: D51B35F225B3C84D8A2B24861AADEBFC
IF YOU HAVE INSTALLED IT AND IT IS IN THE UPDATE LOOP THE FIX IS BELOW.. NO DATA WILL BE LOST
Originally Posted by rbf351 on PSX-Scene
When the PS3 gets stuck in the update loop, pull the hard drive out when the update starts again. it will then give you a counter starting at 60 telling you to reset the machine, DO NOT RESET the machine, let the counter run out. the PS3 will then either reboot or tell you to restart the machine.
while the hard drive is out let the PS3 boot back up. it will give you a message to press the PS button to re-start the update process again or press start and select with the controller plugged in and the USB drive attached with the update
plug in your USB drive, and press start and select. as soon as you press those buttons push the drive back into place, and the machine will install the firmware you have on your usb drive.
http://rebug.me/?p=1