r8282 introduces a regression by adding a line like so:
setup_environ(__import__(settings.SETTINGS_MODULE))
I don't know why this line is used, but since __import__ returns the first package, even in a dotted expression like settings.development, this line has the net effect of running setup_environ on settings.__init__ instead of settings.development, which has, as you can imagine, negative effects - like breaking runserver (since it can't find any settings), and any management command that spawn a subprocess (which captures the new, incorrect DJANGO_SETTINGS_MODULE environment variable).
The attached patch fixes this.
(I'm guessing on the assignee, forgive me if I'm wrong.)
