Personally i think errata is near worthless, anything that is broken enough to truly warrant errata is probably being solved by any halfway competent group of players through moderation and houserules. The only purpose of errata is for those who play in official campaigns and such, it is not for normal groups of people who have respect for each other and do not need to rules lawyer each other.
The only time errata is "good" for a normal group is if a class/prc is unplayable because it is so brokenly weak, and that is remedied. Very few people i have run into actually have encountered long term problems from "overpowered" things that errata would nerf. Everybody I know is more than happy to self-nerf on their own initiative or do so happily with a little prodding from the DM when it comes down to the enjoyment of the others at the table.