SL RC Viewer CPU Usage excessively high when viewer is in focus. Core 0: 5%10% +/ = Core1: 1%5% +/ idle with SL NOT in focus whereas Core 0: 55-75% +/- = Core 1: 95-100% constant w/viewer IN focus. This has been duplicated at each startup. Noted on TaskMan and SpeedFan usage monitors. Before AND after reinstall of RC. All non essential processes are disabled (AVG / Seagate backup / Intervideo / Canon Print / etc). I ensured all drivers are current and up to date (was first thing I checked / thought was issue). Issue occurs regardless of region (several tested). Some noted performance degradation noted when attempting to Edit, Open Inventory, Open Communication panels, Preferences,et cetera. I have 2 older sys' (1 dual core AMD w/ nVidia 7600GT- 1 Intel PIII w/ Onboard Intel Graphics) and laptop (AMD dual core w/ radeon mobile graphics) I will install RC on to see if this is an isolated issue and update as necessary. When setting Affinity to = Core 0 ONLY: 10-20% (viewer NOT in focus) 95-100% (IN focus) - Core 1: maintains 2-5% IN and OUT of focus. Core 1 ONLY: 20-30% (NOT in focus) 100% continuous (IN focus) - Core 0: maintains 5%-10% IN and OUT of focus. When running Second Life 1.23.4 (123908) Jun 11 2009 15:16:56 (Second Life Release) the issue is NOT present. Snowglobe not tested, can dload and test if needed.