First my apologies to everyone, I get grumpy with computers (no people), I want to thank all of you for your assistance.
Called Apple, they are familiar with this error occurrence ( although somewhat tight lipped) They had me rebuild permissions, (no help) then disk verify (it was fine) and then turn off my airport disk sharing thingy (no help), there last instruction was to reinstall Leopard (archive option) have not done this.
On my own observation (copious notes) I have narrowed it down to the screensaver, or something that occurs after the screensaver is turned off by awakening the Mac. I have turned off the screensaver and so far no further problems.
Actually my Macbook is noticeably more zippier in performance.
I had one of Iphoto albums as a screensaver.
Hope this helps someone else. If it occurs again I will post, otherwise Ciao