Though I had previously tested the common usage, last minute i-dotting revealed two problems with the "list files in nightly bringover" fix.
1. Performance: only a moron would try to bundle the entire repo 2. Hg return codes: for no incoming changesets, "hg pull" returns success, but "hg incoming" returns failure (and in so doing does not create an empty bundle file). The more thoroughly tested, updated fix: http://cr.opensolaris.org/~mjnelson/webrev.tools_cleanup_wad_v2/ (wherein everything else besides nightly.sh may be safely ignored) --Mark