For example, /fs used to only alias to Flandre Scarlet. Now, if I type the same abbreviation into the box, I see aliases to Fate (series), from side, flying sweatdrops, frilled skirt, frilled sleeves, fighting stance and fucked silly. Similarly, /rs comes up with multiple entries as well, when it originally only pointed to Remilia Scarlet.
There may be other aliases like this. I just noticed these two because I use them fairly often. What's confusing to me is that only the original aliases show up if I enter /fs or /rs in the alias search box.