In 1.7.1 article movement shortcuts are a bit different in combined mode.
n/p or up/down will scroll long posts before switching to the next one
Ctrl-up/down will move between posts like previous versions
I used to fiddle in the mappings to put N and P on the up/down keys, so this is convenient to me.
However I was playing around a bit with the new behaviour of up/down, and in real life use I think it's less than smooth. If you're looking at small articles, it jumps from one to the next. If you're looking at larger articles, it scrolls quite far on each key press, so I find it hard to keep in the flow of the text you're looking at. When there's a small article after a long one, it jumps down till the small one is on top of the screen. It seemed to me sufficiently random in scrolling down that I reverted back to mapping N/P. That one scrolls down predictably and a relatively small amount, so it feels smoother.
Just my 2 cents. Thanks for the update nevertheless