There will be a roll out Tuesday morning. The package running on Blue Steel and Le Tigre will get promoted to the main change. This is the one that includes the vehicle region crossing fix.
Wednesday there will a single package rolling out to all three RC channels. This package contains a fix for: llGetAgentInfo() so that it now detects AGENT_CROUCHING correctly for avatars who have custom ‘Crouching’ or ‘CrouchWalking’ animations (BUG-4431). There is also a crash mode that has been fixed.
Since they aren’t saying much about the crash mode, I assume it is some exploit or other security fix.
There is one RC viewer and one project viewer on the RC Viewers page. As of late Monday those haven’t changed from last week. The Interesting and Fitted viewers are it.
In the Third Party Viewers class Firestorm has moved back into first place for the most stable viewer. I say first because I don’t count Radegast as a viewer because it is not a graphical viewer in the sense that other TPViewers are. I just don’t see it in the same class.