id	summary	reporter	owner	description	type	status	priority	milestone	component	resolution	keywords	cc	branch	branch_author	launchpad_bug
4022	twisted.web.http_headers.Headers allows itself to be constructed from strings instead of lists	exarkun		"`Headers` is basically an abstraction around a dict mapping `str` to `list` of `str`.  So its initializer will accept such a dict.  However, it will also happily accept a dict mapping `str` to `str` and populate itself with garbage.  It should reject this case.
"	enhancement	closed	low		web	fixed	easy	rwall