I was on 3.71M33-4 and downgraded to 1.5 using Pandora. Then I wanted to update to 3.71M33-4 again, so I had to update to 3.52M33-4 first.
While running "3.52 M33UPDATE" under the game menu, it says to press X to update. When I press X however, it says:
"Error 80020139 loading/starting lflash_fatfmt.prx"
and then it exits out.