Exact same problem after the exact same security update. Reinstalling from PKG file didn't solve it, Tossing the pref file in my user >Library>Pref didn't solve it. Running repair permissions didn't solve it.
Process: Screen Calipers [791]
Path: /Applications/Screen Calipers.app/Contents/MacOS/Screen Calipers
Identifier: com.iconico.ScreenCalipers
Version: 3.2 (3.2)
Code Type: PPC (Translated)
Parent Process: launchd [186]
Date/Time: 2012-02-03 11:32:16.390 -0800
OS Version: Mac OS X 10.6.8 (10K549)
Report Version: 6
Interval Since Last Report: 50722 sec
Crashes Since Last Report: 4
Per-App Interval Since Last Report: 1 sec
Per-App Crashes Since Last Report: 4
Anonymous UUID: 89BED0AF-EDA2-4A3F-91CA-93798BD6A4FD
Exception Type: EXC_CRASH (SIGTRAP)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Thread 0 Crashed: Dispatch queue: com.apple.main-thread
0 libSystem.B.dylib 0x80239236 __pthread_kill + 10
1 libSystem.B.dylib 0x80238ad7 pthread_kill + 95
2 com.iconico.ScreenCalipers 0xb80f5c50 gettimeofday_wrapper + 38072
3 ??? 0x8abb5a83 0 + 2327534211
Thread 1:
0 libSystem.B.dylib 0x80142afa mach_msg_trap + 10
1 libSystem.B.dylib 0x80143267 mach_msg + 68
2 com.iconico.ScreenCalipers 0xb819440f CallPPCFunctionAtAddressInt + 206231
3 libSystem.B.dylib 0x80170259 _pthread_start + 345
4 libSystem.B.dylib 0x801700de thread_start + 34
Thread 2:
0 com.iconico.ScreenCalipers 0xb815acc0 spin_lock_wrapper + 90152
1 com.iconico.ScreenCalipers 0xb8179c5b CallPPCFunctionAtAddressInt + 97763
2 com.iconico.ScreenCalipers 0xb80c6b13 0xb8000000 + 813843
3 com.iconico.ScreenCalipers 0xb80c0037 0xb8000000 + 786487
4 com.iconico.ScreenCalipers 0xb80dd8e8 0xb8000000 + 907496
5 com.iconico.ScreenCalipers 0xb8145397 spin_lock_wrapper + 1791
6 com.iconico.ScreenCalipers 0xb801ceb7 0xb8000000 + 118455
Thread 3:
0 com.iconico.ScreenCalipers 0xb815a8ff spin_lock_wrapper + 89191
1 com.iconico.ScreenCalipers 0xb8176e5d CallPPCFunctionAtAddressInt + 85989
2 com.iconico.ScreenCalipers 0xb80c6b13 0xb8000000 + 813843
3 com.iconico.ScreenCalipers 0xb80c0037 0xb8000000 + 786487
4 com.iconico.ScreenCalipers 0xb80dd8e8 0xb8000000 + 907496
5 com.iconico.ScreenCalipers 0xb8145397 spin_lock_wrapper + 1791
6 com.iconico.ScreenCalipers 0xb801ceb7 0xb8000000 + 118455
Thread 4:
0 com.iconico.ScreenCalipers 0xb815a8ff spin_lock_wrapper + 89191
1 com.iconico.ScreenCalipers 0xb8176e5d CallPPCFunctionAtAddressInt + 85989
2 com.iconico.ScreenCalipers 0xb80c6b13 0xb8000000 + 813843
3 com.iconico.ScreenCalipers 0xb80c0037 0xb8000000 + 786487
4 com.iconico.ScreenCalipers 0xb80dd8e8 0xb8000000 + 907496
5 com.iconico.ScreenCalipers 0xb8145397 spin_lock_wrapper + 1791
6 com.iconico.ScreenCalipers 0xb801ceb7 0xb8000000 + 118455
Thread 0 crashed with X86 Thread State (32-bit):
eax: 0x00000000 ebx: 0x802fc540 ecx: 0xb7fffa6c edx: 0x80239236
edi: 0x8a00e400 esi: 0x00000005 ebp: 0xb7fffa98 esp: 0xb7fffa6c
ss: 0x0000001f efl: 0x00000286 eip: 0x80239236 cs: 0x00000007
ds: 0x0000001f es: 0x0000001f fs: 0x00000000 gs: 0x00000037
cr2: 0x8023922c
Binary Images:
0x80000000 - 0x8005dff7 com.apple.framework.IOKit 2.0 (???) <3DABAB9C-4949-F441-B077-0498F8E47A35> /System/Library/Frameworks/IOKit.framework/Versions/A/IOKit
0x8007d000 - 0x800e7fe7 libstdc++.6.dylib 7.9.0 (compatibility 7.0.0) <411D87F4-B7E1-44EB-F201-F8B4F9227213> /usr/lib/libstdc++.6.dylib
0x80142000 - 0x802e9ff7 libSystem.B.dylib 125.2.11 (compatibility 1.0.0) <2DCD13E3-1BD1-6F25-119A-3863A3848B90> /usr/lib/libSystem.B.dylib
0x8036b000 - 0x804e6fe7 com.apple.CoreFoundation 6.6.6 (550.44) <F88C95CD-1264-782D-A1F5-204739847E93> /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
0x805de000 - 0x805ecfe7 libz.1.dylib 1.2.3 (compatibility 1.0.0) <33C1B260-ED05-945D-FC33-EF56EC791E2E> /usr/lib/libz.1.dylib
0x805f1000 - 0x805fdff7 libkxld.dylib ??? (???) <9A441C48-2D18-E716-5F38-CBEAE6A0BB3E> /usr/lib/system/libkxld.dylib
0x80601000 - 0x80647ff7 libauto.dylib ??? (???) <29422A70-87CF-10E2-CE59-FEE1234CFAAE> /usr/lib/libauto.dylib
0x80654000 - 0x807d6fe7 libicucore.A.dylib 40.0.0 (compatibility 1.0.0) <D5980817-6D19-9636-51C3-E82BAE26776B> /usr/lib/libicucore.A.dylib
0x80838000 - 0x808e5fe7 libobjc.A.dylib 227.0.0 (compatibility 1.0.0) <9F8413A6-736D-37D9-8EB3-7986D4699957> /usr/lib/libobjc.A.dylib
0x808f9000 - 0x808fcfe7 libmathCommon.A.dylib 315.0.0 (compatibility 1.0.0) <1622A54F-1A98-2CBE-B6A4-2122981A500E> /usr/lib/system/libmathCommon.A.dylib
0x8fe00000 - 0x8fe4163b dyld 132.1 (???) <4CDE4F04-0DD6-224E-ACE5-3C06E169A801> /usr/lib/dyld
0xb8000000 - 0xb81defff +com.iconico.ScreenCalipers 3.2 (3.2) <6437A74D-607F-7339-5F7E-F6B0EF81C25D> /Applications/Screen Calipers.app/Contents/MacOS/Screen Calipers
0xffff0000 - 0xffff1fff libSystem.B.dylib ??? (???) <2DCD13E3-1BD1-6F25-119A-3863A3848B90> /usr/lib/libSystem.B.dylib
Translated Code Information:
objc[791]: garbage collection is ON
NO CRASH REPORT
Model: MacPro1,1, BootROM MP11.005C.B08, 4 processors, Dual-Core Intel Xeon, 3 GHz, 4 GB, SMC 1.7f10
Graphics: ATI Radeon X1900 XT, ATY,RadeonX1900, PCIe, 512 MB
Memory Module: global_name
Network Service: Ethernet, Ethernet, en0
PCI Card: ATY,RadeonX1900, sppci_displaycontroller, Slot-1
Serial ATA Device: WDC WD2500AAJS-41RYA0, 232.89 GB
Serial ATA Device: WDC WD2002FAEX-007BA0, 1.82 TB
Serial ATA Device: WDC WD10EALX-009BA0, 931.51 GB
Parallel ATA Device: OPTIARC DVD RW AD-7170A
USB Device: USB2.0 Hub, 0x05e3 (Genesys Logic, Inc.), 0x0608, 0xfd500000 / 3
USB Device: USB2.0 Hub, 0x05e3 (Genesys Logic, Inc.), 0x0608, 0xfd530000 / 4
USB Device: Hub, 0x0424 (SMSC), 0x2512, 0xfd534000 / 7
USB Device: Hub, 0x0424 (SMSC), 0x2602, 0xfd534100 / 8
USB Device: Flash Card Reader, 0x0424 (SMSC), 0x2228, 0xfd534110 / 9
USB Device: Keyboard Hub, 0x05ac (Apple Inc.), 0x1006, 0xfd300000 / 2
USB Device: Apple Optical USB Mouse, 0x05ac (Apple Inc.), 0x0304, 0xfd330000 / 6
USB Device: Apple Keyboard, 0x05ac (Apple Inc.), 0x0220, 0xfd320000 / 5
FireWire Device: built-in_hub, Up to 800 Mb/sec
FireWire Device: > LaCie d2 DVD-RW Firewire, LaCie Group SA, Up to 400 Mb/sec