We have almost the same problem.
Reinstalling after a dead HD has been replaced, from TimeMachine (isn't it just fantastic) and we get, see attached, "NURD&C appears to damaged and should be reinstalled from the original installer. Error - 193" Unfortunately the Mac Shop installed snow leopard when we asked for Leopard and we did notice until now.
So neither Contact or Date apps will open.

Machine details: OSv10.6,
3GHz intel core duo,
4 GB 667 MHz DDR2 SDRAM
Hardware Overview:

Model Name: MacBook
Model Identifier: MacBook2,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 4 MB
Memory: 4 GB
Bus Speed: 667 MHz
Boot ROM Version: MB21.00A5.B07
SMC Version (system): 1.13f3
Serial Number (system): 4H645A4PWGM
Hardware UUID: 00000000-0000-1000-8000-0017F231F707
Sudden Motion Sensor:
State: Enabled

Please advise what next.

Data files open on other macs.

Rosetta selected on both apps.

Thank you in advance.

PS cannot use Now X as we rely on server. Mad
_________________________
Simon
http://www.bramshaw.com.au
Melbourne - Australia GMT +1100