Having large sim issues with a Magnum region (20062.agni.lindenlab.com (216.82.26.75:13001)):
Physics FPS: ~10
Physics Frame time: 36 - 70+ms
17 Agents on sim
Update Physics Shapes pegged beyond 25ms
Second Life RC Magnum 11.05.23.23074
Screenshot: http://img534.imageshack.us/img534/7161/physics.png