Cheers Mickey,
I'll wander through the wiki page again. Last time I looked it seemed to reference BitKeeper in places and BitBake in others and assumed it was therefore incorrect. however looking at it once again I think that I had misunderstood the talk of subversion replacing bitkeeper as the release note clearly says that this is the case for core but makes no reference to anything else. Am I right in thinking that I need both subversion and bitkeeper now? I'll spend time sorting it out for myself and I'll put back any additional comments into the Wiki if I think they might help others.
As for libjpeg. I suspected that it might already be built that way but had no way to easily check. That still leaves me with a Konq/e that can (repeatably) hang my Z or gives black squares. I am using my Z as a remote for a media server running SlimServer. The Slimserver software has an interface skin designed for handhelds and is pretty cool with the one exception that browsing my collection by album cover art is prone to result in a reboot of the Z. The internal jpeg lib was my only good lead :-( back to the drawing board. Second best guess is memory leak. Browsing artwork is going to send a large number of images .....
Anyhow, time to get my build environment up to scratch first.
Neil