Same problem here...
5/3/13 11:49:30.314 PM ReportCrash[11888]: failed looking up LS service ( scCreateSystemService returned MACH_PORT_NULL, called from SetupCoreApplicationServicesCommunicationPort, so using client-side NULL calls.
5/3/13 11:49:30.314 PM ReportCrash[11888]: LaunchServices/5123589: Unable to lookup coreservices session port for session 0x186a0 uid=0 euid=0
5/3/13 11:49:30.314 PM ReportCrash[11888]: failed looking up LS service ( scCreateSystemService returned MACH_PORT_NULL, called from SetupCoreApplicationServicesCommunicationPort, so using client-side NULL calls.
5/3/13 11:49:30.314 PM ReportCrash[11888]: LaunchServices/5123589: Unable to lookup coreservices session port for session 0x186a0 uid=0 euid=0
5/3/13 11:49:30.314 PM ReportCrash[11888]: failed looking up LS service ( scCreateSystemService returned MACH_PORT_NULL, called from SetupCoreApplicationServicesCommunicationPort, so using client-side NULL calls.
5/3/13 11:49:30.314 PM ReportCrash[11888]: LaunchServices/5123589: Unable to lookup coreservices session port for session 0x186a0 uid=0 euid=0
5/3/13 11:49:30.314 PM ReportCrash[11888]: failed looking up LS service ( scCreateSystemService returned MACH_PORT_NULL, called from SetupCoreApplicationServicesCommunicationPort, so using client-side NULL calls.
5/3/13 11:49:30.314 PM ReportCrash[11888]: LaunchServices/5123589: Unable to lookup coreservices session port for session 0x186a0 uid=0 euid=0
5/3/13 11:49:30.314 PM ReportCrash[11888]: failed looking up LS service ( scCreateSystemService returned MACH_PORT_NULL, called from SetupCoreApplicationServicesCommunicationPort, so using client-side NULL calls.
5/3/13 11:49:30.314 PM ReportCrash[11888]: LaunchServices/5123589: Unable to lookup coreservices session port for session 0x186a0 uid=0 euid=0
5/3/13 11:49:30.328 PM com.apple.kextcache[11922]: Child process /usr/sbin/kextcache[11923] exited due to signal 6.
5/3/13 11:49:30.328 PM com.apple.kextcache[11922]: Error 107 rebuilding /System/Library/Caches/com.apple.kext.caches/Startup/kernelcache.
5/3/13 11:49:30.329 PM com.apple.kextd[11869]: kextcache error while updating / (error count: 10)
5/3/13 11:49:30.329 PM com.apple.kextd[11869]: async child pid 11922 exited with status 6
5/3/13 11:49:30.362 PM ReportCrash[11888]: Saved crash report for kextcache[11923] version 268.12 to /Library/Logs/DiagnosticReports/kextcache_2013-05-03-234930_LaBonty-Hackintosh.crash
Kextd and Kextcache are continually crashing... also a possibly related symptom is that when this all started I lost the ability to connect to SMB and AFP network shares. Everything with my hackintosh was seemingly fine until a couple of days ago when this started.
Anyone got any clues where to begin here? I've been trying everything I can for days... no luck.