Yoshihiro has already let the world know about the success of downgrading a 1.52 Japanese firmware to 1.50. Now with the permission of Yoshihiro, we are doing a donation drive to help fund his project with a 1.52 European PSP for testing on the September 1st release date.
"I've already downgraded a PSP 1.52 JAP with success after not finding a PSP 1.51 for testing. You can find the 1.52 update on all sites, and after you downgrade, :=)"
For the cause, feel free to donate by clicking on the PayPal button below.