I think I know what you're talking about. A lot of them have a gap where the top and bottom halves of the front of the intake come together. This is typically associated with clips that have either snapped or have a slight offset.
I actually just noticed this with mine the other day when I was changing my air filter out-- my clips are good, but you can pull them, apart with very little effort because of a slight offset.
On my way out now, but I'll post up some pics when I get back.