After today's security update, my macbook pro is failing to boot: error 19

Update 2012-002 on macbook pro. When rebooting,after 'successful' install, I now see a repeating cycle of Error = 19, unable to mount root. From my *nix perspective I fear the worst - that the boot sector (at a minimum) is hosed. I tried (running Lion 10.7.x) booting with the command key down - no joy. do not currently have my install disk (sadly, it's in storage, somewhere).
I'm concerned about this. this is VERY unusual for an update. This is a relatively new drive (750GB drive installed about 8 months ago). At no point have I seen errors, and believe me, I look.
Assuming the worst case is repartitioning? (ah for hte days of 'fdisk /mbr')

yes. Apologies for being unclear. command--R does nothing but report the same error (note, I have verbose boot enabled).I was an apple tech long ago, I tried myriad key options, just for grins.
Shift key while powering up will bring the expected 'grey' background, with the dark grey apple. After a period of searching, the apple is replaced by the 'no sign'.
an addendum: I believe I know where the issue is, and while I cannot nail it, it's quite likely it is because of a failed filevault2 startup. I went through the process of enabling filevault2, got the key, restarted and when I went to look at the progress of the encryption - it had not 'taken'. I was at the option to enable it again. I didn't think much of that at the time (though I know from working in the past with full drive encryption) that the reboot was invovling a rewrite of the boot sector. However it DID reboot, and more than once. I was able to use the system for a couple of weeks, until today's update. I personally don't feel it had to do with the security update - more it had to do with the failed filevault2 enabling.

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Anonymous UUID:
C72C8841-51A0-BB21-689C-2AB204820087
Mon Dec 30 23:57:23 2013
panic(cpu 0 caller 0xffffff801da5260f): "a freed zone element has been modified: expected 0xdeadbeefdeadbeef but found 0, bits changed 0xdeadbeefdeadbeef, at offset 8 of 128 in zone: kalloc.128"@/SourceCache/xnu/xnu-2422.1.72/osfmk/kern/zalloc.c:461
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0xffffff8096bf3710 : 0xffffff801da5260f
0xffffff8096bf3770 : 0xffffff801da51d09
0xffffff8096bf3870 : 0xffffff801da2aa2f
0xffffff8096bf38a0 : 0xffffff801dde080d
0xffffff8096bf38e0 : 0xffffff7f9fcada11
0xffffff8096bf3930 : 0xffffff7f9fcae16e
0xffffff8096bf39a0 : 0xffffff7f9fcae523
0xffffff8096bf39d0 : 0xffffff801dc13438
0xffffff8096bf3a00 : 0xffffff801dd83378
0xffffff8096bf3a70 : 0xffffff801dbfd1ae
0xffffff8096bf3ae0 : 0xffffff801dbf437a
0xffffff8096bf3b80 : 0xffffff801dbe5f15
0xffffff8096bf3c30 : 0xffffff801dbe67d2
0xffffff8096bf3f50 : 0xffffff801de3de23
0xffffff8096bf3fb0 : 0xffffff801daf3e06
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com.apple.AppleFSCompression.AppleFSCompressionTypeZlib(1.0d1)[E163B7AE-F6E5-328 6-B827-66DB3FE3DB7B]@0xffffff7f9fcac000->0xffffff7f9fcaffff
BSD process name corresponding to current thread: applet
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Kernel UUID: 1D9369E3-D0A5-31B6-8D16-BFFBBB390393
Kernel slide:
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Kernel text base: 0xffffff801da00000
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com.trendmicro.kext.KERedirect 1.0.0
com.logmein.driver.LogMeInSoundDriver 1.0.0
org.virtualbox.kext.VBoxUSB 3.2.6
org.virtualbox.kext.VBoxDrv 3.2.6
com.apple.driver.AppleHWSensor 1.9.5d0
com.apple.driver.AppleHDAHardwareConfigDriver 2.5.3fc1
com.apple.driver.AudioAUUC 1.60
com.apple.driver.AGPM 100.14.11
com.apple.driver.AppleTyMCEDriver 1.0.2d2
com.apple.driver.AppleMikeyHIDDriver 124
com.apple.driver.AppleHDA 2.5.3fc1
com.apple.iokit.IOBluetoothSerialManager 4.2.0f6
com.apple.filesystems.autofs 3.0
com.apple.GeForceTesla 8.1.8
com.apple.driver.AppleSMCLMU 2.0.4d1
com.apple.iokit.IOUserEthernet 1.0.0d1
com.apple.Dont_Steal_Mac_OS_X 7.0.0
com.apple.driver.AppleHWAccess 1
com.apple.driver.AppleMikeyDriver 2.5.3fc1
com.apple.driver.ACPI_SMC_PlatformPlugin 1.0.0
com.apple.driver.AppleMuxControl 3.4.12
com.apple.driver.AppleBacklight 170.3.5
com.apple.driver.AppleLPC 1.7.0
com.apple.driver.AppleUpstreamUserClient 3.5.13
com.apple.nvidia.NVDAStartup 8.1.8
com.apple.driver.SMCMotionSensor 3.0.4d1
com.apple.iokit.IOBluetoothUSBDFU 4.2.0f6
com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport 4.2.0f6
com.apple.driver.AppleMCCSControl 1.1.12
com.apple.driver.AppleUSBTCButtons 240.2
com.apple.driver.AppleIRController 325.7
com.apple.driver.AppleUSBTCKeyEventDriver 240.2
com.apple.driver.AppleUSBTCKeyboard 240.2
com.apple.driver.AppleUSBCardReader 3.3.5
com.apple.driver.AppleFileSystemDriver 3.0.1
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
com.apple.BootCache 35
com.apple.iokit.SCSITaskUserClient 3.6.0
com.apple.driver.XsanFilter 404
com.apple.iokit.IOAHCIBlockStorage 2.4.0
com.apple.iokit.AppleBCM5701Ethernet 3.6.9b9
com.apple.driver.AirPort.Brcm4331 700.20.22
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com.apple.driver.AppleFWOHCI 4.9.9
com.apple.driver.AppleUSBHub 650.4.4
com.apple.driver.AppleUSBEHCI 650.4.1
com.apple.driver.AppleUSBOHCI 650.4.1
com.apple.driver.AppleSmartBatteryManager 161.0.0
com.apple.driver.AppleRTC 2.0
com.apple.driver.AppleHPET 1.8
com.apple.driver.AppleACPIButtons 2.0
com.apple.driver.AppleSMBIOS 2.0
com.apple.driver.AppleACPIEC 2.0
com.apple.driver.AppleAPIC 1.7
com.apple.driver.AppleIntelCPUPowerManagementClient 216.0.0
com.apple.nke.applicationfirewall 153
com.apple.security.quarantine 3
com.apple.driver.AppleIntelCPUPowerManagement 216.0.0
com.apple.AppleGraphicsDeviceControl 3.4.12
com.apple.driver.DspFuncLib 2.5.3fc1
com.apple.vecLib.kext 1.0.0
com.apple.iokit.IOSerialFamily 10.0.7
com.apple.kext.triggers 1.0
com.apple.nvidia.classic.NVDANV50HalTesla 8.1.8
com.apple.iokit.IOAudioFamily 1.9.4fc11
com.apple.kext.OSvKernDSPLib 1.14
com.apple.iokit.IOSurface 91
com.apple.iokit.IOBluetoothFamily 4.2.0f6
com.apple.driver.IOPlatformPluginLegacy 1.0.0
com.apple.driver.AppleGraphicsControl 3.4.12
com.apple.driver.AppleBacklightExpert 1.0.4
com.apple.driver.IOPlatformPluginFamily 5.5.1d27
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com.apple.iokit.IOFireWireIP 2.2.5
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com.apple.iokit.IOUSBHIDDriver 650.4.4
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com.apple.iokit.IOCDStorageFamily 1.7.1
com.apple.iokit.IOAHCISerialATAPI 2.6.0
com.apple.iokit.IOSCSIArchitectureModelFamily 3.6.0
com.apple.iokit.IOEthernetAVBController 1.0.3b3
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com.apple.security.TMSafetyNet 7
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Bluetooth: Version 4.2.0f6 12982, 3 services, 15 devices, 0 incoming serial ports
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Serial ATA Device: TOSHIBA MK2555GSXF, 250.06 GB
Serial ATA Device: HL-DT-ST DVDRW GS23N
USB Device: Built-in iSight
USB Device: Internal Memory Card Reader
USB Device: BRCM2046 Hub
USB Device: Bluetooth USB Host Controller
USB Device: IR Receiver
USB Device: Apple Internal Keyboard / Trackpad
Thunderbolt Bus:
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Thank you,
Nishanth

Please read this whole message before doing anything.
This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
The purpose of the test is to determine whether the problem is caused by third-party software that loads automatically at startup or login, by a peripheral device, by a font conflict, or by corruption of the file system or of certain system caches.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards, if applicable. Start up in safe mode and log in to the account with the problem. You must hold down the shift key twice: once when you boot, and again when you log in.
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Safe mode is much slower to boot and run than normal, with limited graphics performance, and some things won’t work at all, including sound output and Wi-Fi on certain models. The next normal boot may also be somewhat slow.
The login screen appears even if you usually login automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
Test while in safe mode. Same problem?
After testing, reboot as usual (i.e., not in safe mode) and verify that you still have the problem. Post the results of the test.

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Please read this whole message before doing anything.
This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
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