Occasionally I have found that 2 root processes are hogging all of the CPU resources, namely DCCMDaemon and kernal_task. They behave themselves after a restart of my 15" PB, but it is a little annoying - makes the fan go on, etc. Because these are at the root level I have been afraid to force quit. Does anyone know how to resolve this? Are there any preferences that could be deleted to prevent it? Thanks for your help.