Is there any bugs in it ?

Can i customize like what i did on 3.40oe :clown: ?

I don't know about any bugs, but mine works. I have the same theme i had on 3.40 OE.

only problem is u have to convert ur rcos to 3.51 from 3.40 if u r using a custom theme that is
or else when u enter usb mode ur psp will crash
but if don customize stuff then there shouldnt be any problem

^ Exactly.....

Any Themes with custom Paf, Vsh or Common_GUI PRXs will phail on M33...

Apart from that, all good.

unless you use decrypted versions of 3.51 :P

how do i do that ? i want to upgrade my psp to 3.51m33 edition 6 but i heard themes won't work with the flash0 method. explain me more

you can use themes that don't have custom prx files. any theme that uses custom prx's must have 3.51 decrypted prx's so old themes with prx's can't be used (fully).
in saying that any rco based themes will work fine as long as the rco's are 3.51 compatible. in saying that almost all 3.41 rco's will work to a degree but they can make things crash.
if you REALLY want to theme i would stick with 3.41 because atm 3.51 is still too new.