xsnow

The xsnow screensaver's maintainer added code that shows a Ukrainian flag at 30% probability for Russian-locale users, versus 2% for others. A complaint calling it discrimination misfired: the DFSG governs licenses, not behaviour.

Russ Allbery flagged the real worry: software that secretly changes behaviour by locale. The thread's flip, from a Debian dev: the flag already appeared at random; the patch only changed the odds.