Comment 1 for bug 719196

Instead of "doesn't wait between spawns" I think it would be more accurate to say: "doesn't wait until an import has fully spawned before starting the next". What seems to have occur during the wheezy import is that two imports tried to lock the 'meta.db' database at the same time and this operation occurs before the 'import_package.py' script is spawned as a subprocess.

At least, that's my current theory.