http://pspupdates.qj.net/1-50-1-0-Do...g/49/aid/58035
the only advantage is that the 1.0 formware will load unsigned code without the currupt icons so you dont need the % folder in your game folder
when i downgraded to 1.0 devhook would not run so im back to 1.5 now
also with 1.0 o is select and x is back on the main menu
if devhook gets working on 1.0 then i'll probably downgrade untill then i will stick with 1.5