Deciphering a Kernel Panic log

i'm trying understand why 3 month old imac 27" keeps displaying kernel panic message. took machine in genius bar yesterday , suggested re-installing lion "definitely" fix it. re-installed lion , again today kernal panic message appears, here log:

quote

fri feb 10 16:35:52 2012
panic(cpu 1 caller 0xffffff80004dd8e4): "hfs_swap_hfsplusbtinternalnode: unrecognized catalog record type (0x00ca; record #10)\n"@/sourcecache/xnu/xnu-1699.24.23/bsd/hfs/hfs_endian.c:704
backtrace (cpu 1), frame : return address
0xffffff81542a3d50 : 0xffffff8000220702
0xffffff81542a3dd0 : 0xffffff80004dd8e4
0xffffff81542a3e20 : 0xffffff80004de8dc
0xffffff81542a3e70 : 0xffffff80004d2524
0xffffff81542a3eb0 : 0xffffff800031c800
0xffffff81542a3f90 : 0xffffff800031d8f2
0xffffff81542a3fb0 : 0xffffff8000820057

bsd process name corresponding current thread: kernel_task

mac os version:
11d50b

kernel version:
darwin kernel version 11.3.0: thu jan 12 18:47:41 pst 2012; root:xnu-1699.24.23~1/release_x86_64
kernel uuid: 7b6546c7-70e8-3ed8-a6c3-c927e4d3d0d6
system model name: imac12,2 (mac-942b59f58194171b)

system uptime in nanoseconds: 68463732761090
last loaded kext @ 67591111012975: com.apple.driver.appleusbcdc 4.1.15 (addr 0xffffff7f80817000, size 16384)
last unloaded kext @ 67652377522219: com.apple.driver.appleusbcdc 4.1.15 (addr 0xffffff7f80817000, size 12288)
loaded kexts:
com.ambrosiasw.audiosupport 4.0
at.obdev.nke.littlesnitch 2.4.4
com.apple.driver.oxford_semi 3.0.1
com.apple.driver.applebluetoothmultitouch 66.6
com.apple.driver.applehwsensor 1.9.4d0
com.apple.filesystems.autofs 3.0
com.apple.driver.audioauuc 1.59
com.apple.driver.agpm 100.12.42
com.apple.driver.applemikeyhiddriver 122
com.apple.driver.applehda 2.1.7f9
com.apple.driver.applemikeydriver 2.1.7f9
com.apple.driver.appleupstreamuserclient 3.5.9
com.apple.driver.applemccscontrol 1.0.26
com.apple.kext.atiframebuffer 7.1.8
com.apple.iokit.iouserethernet 1.0.0d1
com.apple.dont_steal_mac_os_x 7.0.0
com.apple.driver.audioipcdriver 1.2.2
com.apple.driver.applesmclmu 2.0.1d2
com.apple.driver.applelpc 1.5.3
com.apple.driver.acpi_smc_platformplugin 4.7.5d4
com.apple.driver.applebacklight 170.1.9
com.apple.atiradeonx3000 7.1.8
com.apple.driver.appleintelhd3000graphics 7.1.8
com.apple.driver.appleircontroller 312
com.apple.iokit.scsitaskuserclient 3.0.3
com.apple.driver.appleusbcardreader 3.0.1
com.apple.applefscompression.applefscompressiontypedataless 1.0.0d1
com.apple.applefscompression.applefscompressiontypezlib 1.0.0d1
com.apple.bootcache 33
com.apple.iokit.ioahciblockstorage 2.0.1
com.apple.driver.appleusbhub 4.5.0
com.apple.driver.appleefinvram 1.5.0
com.apple.driver.applefwohci 4.8.9
com.apple.iokit.applebcm5701ethernet 3.0.8b2
com.apple.driver.airport.atheros40 502.60.2
com.apple.driver.appleahciport 2.2.0
com.apple.driver.appleusbehci 4.5.8
com.apple.driver.appleacpibuttons 1.4
com.apple.driver.applertc 1.4
com.apple.driver.applehpet 1.6
com.apple.driver.applesmbios 1.7
com.apple.driver.appleacpiec 1.4
com.apple.driver.appleapic 1.5
com.apple.driver.appleintelcpupowermanagementclient 167.3.0
com.apple.nke.applicationfirewall 3.2.30
com.apple.security.quarantine 1.1
com.apple.driver.appleintelcpupowermanagement 167.3.0
com.apple.iokit.iofirewireserialbusprotocoltransport 2.1.0
com.apple.iokit.iofirewiresbp2 4.2.0
com.apple.driver.applebluetoothhidkeyboard 152.3
com.apple.driver.applehidkeyboard 152.3
com.apple.driver.applemultitouchdriver 220.62.1
com.apple.driver.iobluetoothhiddriver 4.0.3f12
com.apple.kext.triggers 1.0
com.apple.driver.appleavbaudio 1.0.0d11
com.apple.driver.dspfunclib 2.1.7f9
com.apple.driver.applesmbuscontroller 1.0.10d0
com.apple.iokit.iosurface 80.0
com.apple.iokit.iobluetoothserialmanager 4.0.3f12
com.apple.iokit.ioserialfamily 10.0.5
com.apple.iokit.ioavbfamily 1.0.0d22
com.apple.iokit.iofirewireip 2.2.4
com.apple.driver.applehdacontroller 2.1.7f9
com.apple.iokit.iohdafamily 2.1.7f9
com.apple.iokit.ioaudiofamily 1.8.6fc6
com.apple.kext.osvkerndsplib 1.3
com.apple.driver.applepolicycontrol 3.0.16
com.apple.driver.applesmc 3.1.1d8
com.apple.driver.ioplatformpluginfamily 4.7.5d4
com.apple.driver.applesmbuspci 1.0.10d0
com.apple.driver.applegraphicscontrol 3.0.16
com.apple.driver.applebacklightexpert 1.0.3
com.apple.driver.applethunderboltedmsink 1.1.3
com.apple.driver.applethunderboltedmsource 1.1.3
com.apple.iokit.iondrvsupport 2.3.2
com.apple.kext.ati6000controller 7.1.8
com.apple.kext.atisupport 7.1.8
com.apple.driver.appleintelsnbgraphicsfb 7.1.8
com.apple.iokit.iographicsfamily 2.3.2
com.apple.driver.applethunderboltdpoutadapter 1.5.9
com.apple.driver.applethunderboltdpinadapter 1.5.9
com.apple.driver.applethunderboltdpadapterfamily 1.5.9
com.apple.driver.applethunderboltpcidownadapter 1.2.1
com.apple.driver.broadcomusbbluetoothhcicontroller 4.0.3f12
com.apple.driver.appleusbbluetoothhcicontroller 4.0.3f12
com.apple.iokit.iobluetoothfamily 4.0.3f12
com.apple.iokit.ioscsimultimediacommandsdevice 3.0.3
com.apple.iokit.iobdstoragefamily 1.6
com.apple.iokit.iodvdstoragefamily 1.7
com.apple.iokit.iocdstoragefamily 1.7
com.apple.iokit.iousbhiddriver 4.4.5
com.apple.iokit.ioahciserialatapi 2.0.1
com.apple.iokit.ioscsiblockcommandsdevice 3.0.3
com.apple.iokit.iousbmassstorageclass 3.0.1
com.apple.iokit.ioscsiarchitecturemodelfamily 3.0.3
com.apple.driver.appleusbmergenub 4.5.3
com.apple.driver.appleusbcomposite 4.5.8
com.apple.driver.xsanfilter 403
com.apple.driver.applethunderboltnhi 1.3.2
com.apple.iokit.iothunderboltfamily 1.7.4
com.apple.iokit.iousbuserclient 4.5.8
com.apple.iokit.iofirewirefamily 4.4.5
com.apple.iokit.ioethernetavbcontroller 1.0.0d5
com.apple.iokit.io80211family 412.2
com.apple.iokit.ionetworkingfamily 2.0
com.apple.iokit.ioahcifamily 2.0.7
com.apple.driver.appleefiruntime 1.5.0
com.apple.iokit.iousbfamily 4.5.8
com.apple.iokit.iohidfamily 1.7.1
com.apple.iokit.iosmbusfamily 1.1
com.apple.security.sandbox 177.3
com.apple.kext.applematch 1.0.0d1
com.apple.security.tmsafetynet 7
com.apple.driver.diskimages 331.3
com.apple.iokit.iostoragefamily 1.7
com.apple.driver.applekeystore 28.18
com.apple.driver.appleacpiplatform 1.4
com.apple.iokit.iopcifamily 2.6.8
com.apple.iokit.ioacpifamily 1.4

click expand...

can make sense of causing issue?

 

have changed hardware, such hard drive or ram?

 

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