I've seen this weird black thing on the full double page photo in the brochure and always wondered what it was:

Weird! Anyone know what it does?

I believe it is there to reduce splash-forward. All high ground clearance cars tend to fire water forwards at an upwards angle when driving through deep puddles. You then run into this water, soaking the windscreen. Land Rovers were very bad for it. If that is what it is there for it only works to a limited extent as the Yeti is still prone to 'wetting its face' when driving at speed through puddles.

There are however other hidden spoilers on the car I believe. Moulded into the tail lights there is a vertical line at the outer edge which I think is there to separate the airflow along the sides of the vehicle and prevent dirt from the rear quarters being swept round onto the tail light lenses. All vehicles accumulate dirt on their sides in dirty conditions and this travels along the sides of the vehicle over time, until the airflow is disrupted. You can see this effect where dirt builds up on the trailing edges of doors. What it can't stop is dirt sucked up from under the vehicle being deposited on the tail gate and lights

There is a spoiler on the top of the tailgate. Gentle, but nevertheless there.

I believe it is there to reduce splash-forward.

Ah thanks Hazy! That explains it nicely!