Nouns in the vocabulary list should have articles
I just finished a French lesson and got a couple of new words wrong by using the wrong articles, so when I got back to the page for the "Food" unit (http://duolingo.com/#/skill/fr/Food) I scrolled down to the list of "words you've learned" to revise the genders. But genders don't appear on this list; you have to go back to the main vocabulary list to see the (m) or (f) next to each noun.
It's a small change, but I think having the gender indicated every time the word appears in a vocabulary list would be very helpful. I haven't really learned the word if I can't remember the gender.
In fact, I'd prefer it if the vocabulary lists wrote it out as "la pomme" rather than "pomme (f)", but that's less important as long as the gender is given somewhere.