Red Squirrel has updated his dumper tool for Playstation Portable.

Changes:

-Increased the available buffer to allow the CORRECT extraction of the 3.90 Firmware from Official Updater Eboot.
-Now the 3.90F Firmware can be extracted perfectly
-Only X and O functions will work without problems, the SQUARE function (extract and decrypt of ALL files) works fine but ends with and error when search for reboot.bin!

http://forums.qj.net/showthread.php?t=133890