10.6.5 update problems: my apps crashes on launch! :-(

Hi,
I just updated to 10.6.5 from 10.6.4 and after the update several applications fail to launch. When I start them, they immediately crash! For example these apps crash on each launch: iTunes, DVD Player, Front Row, Cyberduck, Spotify, Google Chrome.
I have rebooted the machine a couple of additional times and have run a permissions repair to no help.
The crash logs looks something like:
Date/Time: 2010-11-12 22:50:25.992 +0100
OS Version: Mac OS X 10.6.5 (10H574)
Report Version: 6
Exception Type: EXCBADACCESS (SIGSEGV)
Exception Codes: KERNINVALIDADDRESS at 0x00000000ffe52c90
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Thread 0 Crashed: Dispatch queue: com.apple.main-thread
0 libSystem.B.dylib 0x992712b0 strlen + 16
1 libSystem.B.dylib 0x9927bc60 __vfprintf + 6630
Thread 1: Dispatch que
Sigh. What else can I do to work around this - except for reinstalling the machine?
Regards,
/Tommy

Restore your bootable backup/clone or Time Machine backup of your previous 10.6.4 installation. Also, create a new admin user account, log into it, and see if the problem persists.

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5 Foundation 0x305657b8 0x30501000 + 411576
6 Foundation 0x3056575c 0x30501000 + 411484
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Best regards,
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result in a negative user experience for your app.”
(https://msdn.microsoft.com/en-us/library/windows/apps/xaml/dn642092.aspx)
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