just as i suspected....Palmer is now "doubtful" to start this sunday...
"I'm 95 percent sure he is not going to play," one source close to the situation said Friday afternoon. "Practicing Wednesday and Thursday, he felt he's not ready to make those high-velocity throws yet. Maybe they could decide something at the last minute, but I don't think he's going to play."
http://espn.go.com/nfl/story/_/id/7131706/carson-palmer-oakland-raiders-unlikely-play-sunday-all-source-says
it makes way more sense to let him start after the bye week.