Thanks for the help everyone!

Regarding Mac OS 10.5, this is not a major concern.
I can build a copy of the app on my G5 which still runs 10.5.
My major concern with this release has been the download-engine and making sure it completes the files in a fast efficient manner.
Seems to do that so far, so I'll work on the minor cosmetics left and we should be able to call it final unless someone reports a show stopper.
