I agree, this must be a leak to spurn those who are holding out. Let's take valuable time away from legitimate replacements for the purpose of getting one good player and another who has yet to maximize his potential to sign their tenders.
Wait, nope, I don't think so. I think the Packers are trying to figure out where to place these guys to best suit the team. The Raji/Pickett move makes sense in that Raji has youth and power on his side. The Bush/Blackmon move makes sense in that Bush is a good special teamer and they'd like to find a position that he can double his value with on the team. Blackmon is quick and elusive with the ball in his hands, putting him at Safety would give him more ballhawking opportunities.
The information isn't leaked. They have reporters watching the OTA's and they are reporting their observations.
I do think the moves are moderately related to the unsigned players. I do not think the information hitting the internet or public is any kind of 'leak'. It's reporters doing their job while they observe the OTA's.
I think if Bush or Blackmon falter in their new position, they'll be outtie.