id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
20103	None no longer matches zero-length string on CharField	Simon Litchfield	nobody	"I've just updated from 1.5 stable to latest commit aaec4f2bd8a63b3dceebad7804c5897e7874833d.

`Model.objects.filter(mycharfield=None)` ''used to'' return instances where mycharfield is actually a zero-length string.

Now, it seems I need to explicitly specify `Model.objects.filter(mycharfield='')`

Minor change, but the implications could be pretty severe for some apps.

Suggest either reverting to previous behaviour or updating the ""backwards incompatible changes"" list."	Uncategorized	closed	Documentation	1.5	Normal	duplicate			Unreviewed	0	0	0	0	1	0