This is news to me; it’s wild stuff actually… Reported are two UMDs — DJ Max Fever and Dissidia: Final Fantasy — that actually check the contents of your memory stick, if one finds something it doesn’t like, it takes unexpected action… And there could be others too.

This is where Torch’s CFW Folder Blocker comes into play. Prevent UMDs from detecting the presence of the ms0:/seplugins and ms0:/iso directories on your memory stick. Since version 1.1, CFW Folder Blocker no longer activates when using homebrew. So as the old adage goes: check yourself, before you wreck yourself.

Download: CFW Folder Blocker v1.1

- source: qj