I missed that bit. Truth is I've never read perlthrtut beyond the first couple of paras because it seemed to be dealing with threads at a very general level which I'm already reasonably comfortable with. It also goes into way to much detail about all the different flavours of threads which perl doesn't use for my taste.

There definitely seem to be a few bugs still in the 5.8 implementation. Much of it deriving from the inherently non-reentrant nature of the perl core from what I can work out. There's also a lack of good sample code right now.