PSP3d.com have posted some great news with videos of a new exploit for the Firmware V2.5 PSPs, heres the info they posted:
"Incuded are 2 movies 1 shows my software as 2.5. And the other shows My psp view the included EBOOT and lock up because the EBOOT contains the overflow.tif from the MPH downgrader. After it locked up I cut the power and rebooted. My psp worked fine after I rebooted it. No downgrade yet from this. but the EBOOT included bypasses the TIF patch because the psp TIF patch does not affect the EBOOT handler"
Interesting news, download the videos from the link above and let us know what you think ?
Remember the site above is the official source and not other sites who dont like linking to release sites.