I think I once saw that the newer FW versions had this exploit too.
BUT, we can't run the eloader so we can't downgrade. I saw PSP-hacks.com (this guy already updated the post about the .exe) so I was thinkin. If this is just a "plug your PSP and downgrade", couldn't we use it on newer FW versions?

Just an ideia coming from my poor memory. Couldn't find the post to that said that.

PS: I didn't saw that post on this site.

and please flame at will if you want.