Cannot Install Safari Extensions

Greetings,
Trying to install an extension on my Safari Version 8.0 (10600.1.25.1)
An extension installed successfully, but after Safari restart its all gone.
Does not matter which extension and how many,
After install I can see extensions in Safari Preferences window, but not after a restart.
I can see newly installed extensions in ~/Library/Safari/Extensions/ folder, the folder has correct permissions and owner.
Even though there are extensions in ~/Library/Safari/Extensions/ , Safari does not "sees" it after a restart.
It seems like this problem is specific to my PC, as I have checked it with other people - they don't experience it.
Please help !

Back up all data before proceeding.
Launch the Keychain Access application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Keychain Access in the icon grid.
Use the search box in the toolbar of the Keychain Access window to search for an item named "Safari Extensions List". If found, delete it. Quit Keychain Access.
Quit and relaunch Safari.

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Here's the console log…
t12/11/10 2:54:01 PM Installer[1054] @(#)PROGRAM:Install PROJECT:Install-582.1
12/11/10 2:54:01 PM Installer[1054] @(#)PROGRAM:Installer PROJECT:Installer-430.1
12/11/10 2:54:01 PM Installer[1054] Hardware: Macmini4,1 @ 2.40 GHz (x 2), 2048 MB RAM
12/11/10 2:54:01 PM Installer[1054] Running OS Build: Mac OS X 10.6.5 (10H574)
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12/11/10 2:54:02 PM Installer[1054] Package Authoring Warning: Package reference does not include required hash for package id auto.
12/11/10 2:54:05 PM Installer[1054] PackageKit: * Missing bundle identifier: /Volumes/Macintosh HD/Library/Receipts/CC Audio Unit plug-in.pkg
12/11/10 2:54:05 PM Installer[1054] PackageKit: * Missing bundle identifier: /Volumes/Macintosh HD/Library/Receipts/CC Support Files.pkg
12/11/10 2:54:05 PM Installer[1054] PackageKit: * Missing bundle identifier: /Volumes/Macintosh HD/Library/Receipts/CC VST plug-in.pkg
12/11/10 2:54:05 PM Installer[1054] PackageKit: * Missing bundle identifier: /Volumes/Macintosh HD/Library/Receipts/CPDEMO Audio Unit plug-in.pkg
12/11/10 2:54:05 PM Installer[1054] PackageKit: * Missing bundle identifier: /Volumes/Macintosh HD/Library/Receipts/CPDEMO Support Files.pkg
12/11/10 2:54:05 PM Installer[1054] PackageKit: * Missing bundle identifier: /Volumes/Macintosh HD/Library/Receipts/CPDEMO VST plug-in.pkg
12/11/10 2:54:05 PM Installer[1054] PackageKit: * Missing bundle identifier: /Volumes/Macintosh HD/Library/Receipts/CSDEMO Audio Unit plug-in.pkg
12/11/10 2:54:05 PM Installer[1054] PackageKit: * Missing bundle identifier: /Volumes/Macintosh HD/Library/Receipts/CSDEMO Support Files.pkg
12/11/10 2:54:05 PM Installer[1054] PackageKit: * Missing bundle identifier: /Volumes/Macintosh HD/Library/Receipts/CSDEMO VST plug-in.pkg
12/11/10 2:54:05 PM Installer[1054] PackageKit: * Missing bundle identifier: /Library/Receipts/CC Audio Unit plug-in.pkg
12/11/10 2:54:05 PM Installer[1054] PackageKit: * Missing bundle identifier: /Library/Receipts/CC Support Files.pkg
12/11/10 2:54:05 PM Installer[1054] PackageKit: * Missing bundle identifier: /Library/Receipts/CC VST plug-in.pkg
12/11/10 2:54:05 PM Installer[1054] PackageKit: * Missing bundle identifier: /Library/Receipts/CPDEMO Audio Unit plug-in.pkg
12/11/10 2:54:05 PM Installer[1054] PackageKit: * Missing bundle identifier: /Library/Receipts/CPDEMO Support Files.pkg
12/11/10 2:54:05 PM Installer[1054] PackageKit: * Missing bundle identifier: /Library/Receipts/CPDEMO VST plug-in.pkg
12/11/10 2:54:05 PM Installer[1054] PackageKit: * Missing bundle identifier: /Library/Receipts/CSDEMO Audio Unit plug-in.pkg
12/11/10 2:54:05 PM Installer[1054] PackageKit: * Missing bundle identifier: /Library/Receipts/CSDEMO Support Files.pkg
12/11/10 2:54:05 PM Installer[1054] PackageKit: * Missing bundle identifier: /Library/Receipts/CSDEMO VST plug-in.pkg
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12/11/10 2:54:23 PM Installer[1054] Split view bounds: {{0, 0}, {402, 104}}
12/11/10 2:54:23 PM Installer[1054] Subview frame: {{0, 0}, {0, 32}}
12/11/10 2:54:23 PM Installer[1054] Subview frame: {{0, 0}, {402, 104}}
12/11/10 2:54:23 PM Installer[1054] The outer edges of the subview frames are supposed to line up with the split view's bounds' edges. NSSplitView is working around the problem, perhaps at the cost of more redrawing. (This message is only logged once per NSSplitView.)
12/11/10 2:54:29 PM com.apple.launchd.peruser.501[161] (com.apple.pbs) Throttling respawn: Will start in 10 seconds
12/11/10 2:54:32 PM Installer[1054] =============================================================================== =
12/11/10 2:54:32 PM Installer[1054] User picked Standard Install
12/11/10 2:54:32 PM Installer[1054] Choices selected for installation:
12/11/10 2:54:32 PM Installer[1054] Install: "Safari"
12/11/10 2:54:32 PM Installer[1054] Install: "Safari"
12/11/10 2:54:32 PM Installer[1054] =============================================================================== =
12/11/10 2:54:32 PM Installer[1054] Configuring volume "Macintosh HD"
12/11/10 2:54:32 PM Installer[1054] Free space on "Macintosh HD": 113.75 GB (113747685376 bytes).
12/11/10 2:54:32 PM Installer[1054] Create temporary directory "/var/folders/IY/IY58WsoNFHOowzLz029Au++TI/-Tmp-//Install.1054bbwNPC"
12/11/10 2:54:32 PM Installer[1054] IFPKInstallElement (1 packages)
12/11/10 2:54:32 PM installd[1064] PackageKit: ----- Begin install -----
12/11/10 2:54:38 PM /System/Library/PrivateFrameworks/PackageKit.framework/Resources/shove[1080] [source=file] failed _RelinkFile(/Volumes/Macintosh HD/.PKInstallSandbox-tmp/Root/Applications/Safari.app/Contents/Resources/CacheC ontroller.nib/keyedobjects.nib, /Volumes/Macintosh HD/Applications/Safari.app/Contents/Resources/CacheController.nib/keyedobjects. nib): Operation not permitted
12/11/10 2:54:38 PM com.apple.installd[1064] Operation not permitted
12/11/10 2:54:38 PM installd[1064] PackageKit: Install Failed: (null)
Error Domain=PKInstallErrorDomain Code=120 UserInfo=0x10065b310 "An unexpected error occurred while moving files to the final destination." Underlying Error=(Error Domain=NSPOSIXErrorDomain Code=1 "The operation couldn’t be completed. Operation not permitted") {
NSLocalizedDescription = "An unexpected error occurred while moving files to the final destination.";
NSUnderlyingError = "Error Domain=NSPOSIXErrorDomain Code=1 \"The operation couldn\U2019t be completed. Operation not permitted\"";
arguments = (
"-f",
"-s",
"/Volumes/Macintosh HD/.PKInstallSandbox-tmp/Root",
"/Volumes/Macintosh HD"
12/11/10 2:54:39 PM Installer[1054] Install failed: The Installer encountered an error that caused the installation to fail. Contact the software manufacturer for assistance.
12/11/10 2:54:39 PM Installer[1054] IFDInstallController 2BEA50 state = 7
12/11/10 2:54:39 PM Installer[1054] Displaying 'Install Failed' UI.
12/11/10 2:54:39 PM Installer[1054] 'Install Failed' UI displayed message:'The Installer encountered an error that caused the installation to fail. Contact the software manufacturer for assistance.'.
12/11/10 2:54:39 PM Installer[1054] The Installer encountered an error that caused the installation to fail. Contact the software manufacturer for assistance.

baltwo wrote:
For starters, there shouldn't be anything in /Volumes/Macintosh HD/Library/Receipts/ except the InstallHistory.plist and Modular Software Download.plist files …
This isn't necessarily true. Some third party apps installed with Apple's Installer.app still place installer pkg files in /Library/Receipts/ & if present Snow Leopard's permissions repair still references them for correct permissions of the associated files.
It won't help solve this issue but if any of these pkg files are there it does not indicate a problem & they should not be removed.

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(67082)

Cannot Install Safari Extensions

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