To quote from his site (linked above), roughly translated:
Here I bring the new version.
• Code optimization.
• Fixed USB port allocation.
• Fixed black screen.
• Only have a USB MASS STORAGE USB connected to load FIRM LOADER.
• UPDATE NO FIRM while in USB mode LOADER.
Thanks for reporting bugs!
Stay tuned for more PS3 Hacks and PS3 CFW news, follow us on Twitter and be sure to drop by the PS3 Hacks and PS3 Custom Firmware Forums for the latest PlayStation 3 scene updates and homebrew releases!
Yea because we use a custom payload to be able to do something in the background was normally wouldnt be possible. And this isn't simply turn on the dev modus of the ps3. This can happen in case of that the custom payload have get a new systemcall that define to swap the given dir with the dir from the /Dev_BDVD/ or the /App_Home/.
[let us say someone have added the syscall: "sys_lv1_systemcall_Jailbreak" and when this syscall comes into action it will do: replace %1=%2]
Even with CJ's patch to the Backup Manager there for that also debug user can install and run the hb app you will not be able to boot backups with the programm.
Douring reboot back into the xmb the magic is done and two variables will be swapped with each other.
The Backup Manager set up the following variables:
set /v gamepath=%1
set /v drivepath=%2
and after that he will call "sys_lv1_systemcall_Jailbreak" to the HV and your Backups will be playable.
I don't think you can run 3.15 via the loader, just end up with a black screen.
Please do correct me if i'm wrong here - I've got 3.41 on my PS3 and have a copy of 3.15 dev_flash so would be really interested - just haven't had time to test it any further than the first failure.
If JaiCraB is listening - is there any chance you could change the loader so that the dev_flash can be a folder on the root of the usb device - I use my USB stick for other things and try keeping it tidy
So right now I'm running firmware 3.15 on my PS3. I just copied my dev_flash to my USB drive (and made a few backups). If I now update to 3.41, should I still be able to load my 3.15 firmware from the USB drive?