02-18-2011,09:52 AM
OK, deleted GTAIV using mm and whoosh, 10GB came back!! Woot!
Supports my theory that to have more chance of a successful recovery of space, you have to remove the game using the same payload/manager that you installed the game with. 
@ext22, in my experience only removing the hdd and formatting with pc works. Oh, and sadly, bye, bye trophies unless you can re-sync with psn.
Last edited by cerebr_al; 02-18-2011 at 09:55 AM.
Reason: adding response to poster
"We all agree your theory is crazy, but is it crazy enough?" - Neils Bohr