"The application iChat quit unexpectedly"; "Library not loaded"?

Question

Whenever I try to launch iChat, I receive "the application iChat quit unexpectedly" error.
Neither "Relaunch" nor "Reset and Relaunch" fix the issue, and when I click "Report" and view the "Report Details" it gives the output enclosed below.
The gist of the error is "Library not loaded: /System/Library/PrivateFrameworks/ScreenSharing.framework/Versions/A/ScreenShar ing".
It also says "Reason: no suitable image found", but it also says it:
"Did find:
/System/Library/PrivateFrameworks/ScreenSharing.framework/Versions/A/ScreenShari ng: unknown file type, first eight bytes: 0x6E 0x61 0x6D 0x65 0x20 0x20 0x48 0x42"
I've removed and reinstalled iChat (when in Safe Boot -- with the Shift key) from Disk 1 of the Mac OS X Install disk 1 by using the "Optional Installs.mpkg" installer and selecting only iChat, but I still receive the same error.
How can I reinstall this "ScreenSharing" library? Would that likely fix the issue?
PS - I just realized that if I go to "System Preferences" and click "Sharing", the options are totally blank! I can't see any options or change any Sharing configuration! All my other System Preferences show up correctly.
So now the question becomes, how do I install just the "Sharing" System Preference?
Or should I try to reset permissions on the Sharing System Preference somehow?
Thanks!!
SEE FULL PROBLEM REPORT BELOW
Process: iChat [408]
Path: /Applications/iChat.app/Contents/MacOS/iChat
Identifier: com.apple.iChat
Version: ??? (???)
Build Info: iChat-6010000~3
Code Type: X86 (Native)
Parent Process: launchd [125]
Date/Time: 2008-08-15 22:04:31.645 -0400
OS Version: Mac OS X 10.5.4 (9E17)
Report Version: 6
Exception Type: EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000002, 0x0000000000000000
Crashed Thread: 0
Dyld Error Message:
Library not loaded: /System/Library/PrivateFrameworks/ScreenSharing.framework/Versions/A/ScreenShar ing
Referenced from: /Applications/iChat.app/Contents/MacOS/iChat
Reason: no suitable image found. Did find:
/System/Library/PrivateFrameworks/ScreenSharing.framework/Versions/A/ScreenShar ing: unknown file type, first eight bytes: 0x6E 0x61 0x6D 0x65 0x20 0x20 0x48 0x42
Thank you!!
Message was edited by: NYCPhotoGuy

Answer 1

NYCPhotoGuy wrote:
Dyld Error Message:
Library not loaded: /System/Library/PrivateFrameworks/ScreenSharing.framework/Versions/A/ScreenShar ing
Referenced from: /Applications/iChat.app/Contents/MacOS/iChat
Reason: no suitable image found. Did find:
/System/Library/PrivateFrameworks/ScreenSharing.framework/Versions/A/ScreenShar ing: unknown file type, first eight bytes: 0x6E 0x61 0x6D 0x65 0x20 0x20 0x48 0x42
Note that the first eight bytes of a Universal-Binary Mach-O image should be 0xCAFEBABE, 0x00000002. Since the existing file was so vastly different, after all else is said and done, you may want to make sure your hard drive checks out okay in Disk Utility.