id,summary,reporter,owner,description,type,status,priority,milestone,component,version,severity,resolution,keywords,cc
14892,minor improvement on category__in,sboisvert,scribu,"if category__in is only provided an int, it will fail (relatively silently). I find this to be ""not friendly"" 

If I may suggest changing lines 1371-1372 in /wp-includes/query.php  to this:

{{{
if ( !is_array($qv['category__in']) || empty($qv['category__in']) ) {
	if (is_long($qv['category__in']) || is_int($qv['category__in'])){
		$qv['category__in'] = array($qv['category__in']);
	} else{
		$qv['category__in'] = array();	
	}
}}}

I would in the same vein implement the change for category__not_in

{{{
if ( !is_array($qv['category__not_in']) || empty($qv['category__not_in']) ) {
				if (is_long($qv['category__not_in']) || is_int($qv['category__not_in'])){
					$qv['category__not_in'] = array($qv['category__not_in']);
				} else{
					$qv['category__not_in'] = array();	
				}
}}}

I would also suggest implementing for tag__in and etc etc 

",enhancement,closed,normal,3.1,Query,3.1,minor,fixed,,stboisvert@…