That "stolen, pre-transition, sexualized picture" of Nyberg is the one Milo put at the top of his
first article about Sarah:
It's a picture Nyberg used to share constantly, just ask
@Sunosis. He was an ffshrine user and knew Sarah when she shared selfies all the time. He's even
corrected Sarah on twitter before when she tried to lie about that same picture.
The picture (or a very similar one) is even referenced in the #al-pott logs (see @Sunosis' earlier post for log archives). The people in that channel, who all know Sarah, refer to it as the "wolverine Ender" pic in 2006-08-19.060045.html and note that Nyberg has hairy shoulders. "Ender" was a pseudonym Nyberg used to use at the time.
edit:
Here is an archive of 50+ other Nyberg selfies that
@Sunosis found in his backups while digging for #ffshrine logs. Nyberg gave them out all the time, posted them on /b/, etc.