id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
16573	"meta_query doesnt support ""empty"" values"	dd32		"Basically, a meta_value of '0' is ignored in meta queries, It bases it on empty(), so a meta value being ""empty"" is ignored. 

This mainly comes into play for numeric comparisons, ie. field >= 0 (do not want -50 etc)

Code: [http://core.trac.wordpress.org/browser/trunk/wp-includes/meta.php?rev=17170#L423 Line 423] change from empty() to strlen()?

Core includes a [http://core.trac.wordpress.org/changeset/17088#file2 hack] to work around this already"	defect (bug)	closed	normal		Query	3.1	normal	duplicate	needs-patch