I can't be 100% sure it started after the upgrade because the days float together and I forgot when I did the upgrade. But I am certain of when the crash reports started. Code: $ grep 'Segmentation fault' /var/log/system.log Feb 12 02:33:23 ihack com.apple.launchd.peruser.501 (com.apple.helpd): Job appears to have crashed: Segmentation fault: 11 Feb 12 09:31:41 ihack com.apple.launchd.peruser.501 (com.apple.helpd): Job appears to have crashed: Segmentation fault: 11 $ ls Library/Logs/DiagnosticReports/helpd_2012-02-* Library/Logs/DiagnosticReports/helpd_2012-02-08-185623_ihack.crash Library/Logs/DiagnosticReports/helpd_2012-02-08-185707_ihack.crash Library/Logs/DiagnosticReports/helpd_2012-02-09-063606_ihack.crash Library/Logs/DiagnosticReports/helpd_2012-02-09-070522_ihack.crash Library/Logs/DiagnosticReports/helpd_2012-02-12-023324_ihack.crash Library/Logs/DiagnosticReports/helpd_2012-02-12-093142_ihack.crash $ /System/Library/PrivateFrameworks/HelpData.framework/Versions/A/Resources/helpd Segmentation fault: 11 It hangs for a couple of minutes on the cli before exiting with that error and a graphical crash dialog pop-up. I've attached the latest crash report because it made the post too long. Today it happened once when I woke up, not counting the time I tried running it myself manually. I had VMware fusion 3, firefox beta, Finder and iTunes running at the time. In the background, tmux, irssi, rtorrent, vim, several bash and ssh sessions. My system is an iMac11,3 and has not been reinstalled since purchase, it was upgraded from Snow Leopard to Lion at release of said version.