Not long after we received word that Sony's Official Firmware 4.05 was decrypted, we find that Red Squirrel has updated the RSPsar Dumper to version 3.5, with support for 4.05. Here's the changelog from Red Squirrel:

-Added support for 4.05 Official Firmware
-Fixed usbhostfs.prx that did not work in CF 4.01M33
-My last public update for this homebrew.