Linden Lab have made a new Second Life viewer release-candidate available. RC4 is the fifth release candidate in the 1.23 series (Linden Lab starts counting from RC0). It's looking increasingly like the objective is to release before the Second Life sixth anniversary (23 June).
Barely any changes this time around, so either Linden Lab isn't really aware of any showstoppers or doesn't perceive them as such. The context menus have had one small reversion, there are updates to the Mac crash reporter, and a fix relating to object updates that affected poseball visibility.