"Wikipedystka", in Polish, describes a female Wikipedian (as opposed to the male "wikipedysta"). As of today, Polish female Wikipedians are no longer called "wikipedysta" if they choose to publicly identify their gender as female.
Here are a few examples: http://pl.wikipedia.org/wiki/Wikipedystka:Tanja5 http://pl.wikipedia.org/wiki/Wikipedystka:Joanna_Ko%C5%9Bmider http://pl.wikipedia.org/wiki/Wikipedystka:AldraW
This is also visible in other places, e.g. recent changes on Polish Wikipedia.
This change is a result of the roll-out of a new version of our software. Other languages, like German, which also have gender-specific terms to describe users, will be upgraded in the coming days.
It's a small thing, but hopefully it'll make gender diversity (and lack thereof) a bit more visible, at least in languages which are more expressive than English. ;-)
Cheers, Erik