query_posts with taxonomy forcing post_type = ‘any’

I have a plugin that creates a WP taxonomy (for magazine issues).

I’ve created a convenience function called query_magazine_posts that calls query_posts and passes the taxonomy term.

function query_magazine_posts ( ... ) {
	$qs = "orderby=ID&taxonomy=magazine&post_type=post";
	query_posts( $qs );
}

However, post revisions (from WP’s auto-save feature) are being returned in my results. I see in WP_Query that (on line 1199) the post_type is being forced to equal any on taxonomy pages.

Is this by design and is there any way to exclude records that have post_type = revision?

Thanks in advance,

Alex