I have the same behavior here (after leaving computer / idle 10+ minutes CPU load is on 100% with beagle). After killing the beagle process everything is fine again.
Not having any word documents on my computer (read about issues with that). Some other people seem to have this issue: http://www.ubuntuforums.org/showthread.php?t=162089&highlight=cpu+beagle -- beagled-helper loads CPU https://launchpad.net/bugs/64326 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs