Its only been a few days and Dark_AleX has released Custom Firmware 5.00 M33 at lightning speed.
Apart from the obvious firmware number change (see below), this update comes with a bug fix.
Dark_AleX:
Bug fix: when changing speed in xmb, and the psp turned the brightness to 0 automatically the speed was reseted to 222 again.
The readme [...]

It seems to be that there is a CFW 3.93 though we previously said there wouldnt be a release from team M33 well we didnt lie. This firmware is made by a new developer Mathieulh. He states that had no hand in the making. This CFW has all the updates of 3.93, CFW, and a [...]

Posted on Alek’s website on April 19th, is a list of clarifications confirming there will be no M33 3.93 or 3.95 but there will be a 4.00. All people whining about being stuck at 3.93 official firmware will now be directed to pandora battery tutorials in the forums.

On another note, you lurkers should make accounts [...]