I got my ps3 and updated it from 3.41 to 3.5 then discovered they could be jailbroken , so i downgraded to 3.41 again and did all that. I then got Waninkoko's V2 firmware and updated to that from the menu and it worked a treat.
I have a slim 250g ps3 CECH 2003B and everything looks to be working fine on it now. Just have to update my multiman and check it out.
I'm not sure if the community knows or not, but Waninkoko was the first coder to get the Wii system working though his work was leaked initially which caused a bit of annoyance. He has been around for quite some time and has been a godsend to anyone in the wii side of things. I know there were some issues with his original firmware, but he can't test every different version of console so people need to know they are taking a chance with anything like this.
Anyway , i'll stick with his stuff as ive been following his work since the first release and he has been pretty much spot on with everything he has done up to the hic-cup recently.
I'd also like to say thanks for all his and other devs input, a thing a lot of people seem to forget to say when they get something for free that someone has put hours of work into.