Seeing this has made me realize that I have one HUGE bug with native Postgres full text search.
On my blog, I have a lot of articles about the game series Borderlands. If you type "Borderlands" into the search box, it will find them, but if you type "border lands", it won't. Same with "starcraft" and "star craft", etc.
It looks like I will have to implement trigrams on top of full text search to fix: