This one seems pretty fundamental to me — should the steering wheel ever control the gas?
See one of Refinery29's slideshows. The arrows are the navigation: clicking right flips to the next slide and clicking left flips to the previous slide. That is, until you get to the last slide. Now there's a small tooltip when you hover over the right arrow that says "next slideshow." Now if you click the right arrow, you will be taken away from the current page and brought to a different page.
 Here's how it looks, tooltip says "next slideshow:"
Is it clearly a bad experience if navigational arrows are behaving so differently based on context? Is there any research I can reference?
I could see an argument for this functionality if the next slideshow was somehow a narrative extension of the first, but this does not appear to be the case.