Applied 10.9.3 Combo Update, Software Update wants to apply 10.9.3

Question

Since I have multiple Mac's (including one that I'm about to upgrade to Mavericks) to update, I downloaded the 10.9.3 Combo update (the May 15th version).  I applied it to my MBP, along with iTunes 11.2.1 and Raw Camera Update 5.05.   The MBP rebooted and came up just fine ... but Software Update continues to claim that it needs to apply 10.9.3.  (It no longer wants to apply the other two updates, which it listed previously.)  An extra reboot (on the theory that some of the updating is done after reboot and Software Update might be looking at some pre-finalization cached data) changed nothing.
About This Mac shows 10.9.2, so it's not just Software Update that's confused.
The Combo .dmg file is on a network-mounted volume.
A look through the install log shows that something apparently went wrong, but then the installation claimed success anyway:
May 26 09:18:09 Jerrolds-MacBook-Pro.local suhelperd (0)[165]: Verifying package at path: /Library/Updates/_ManualUpdate/OSXUpdCombo10.9.3.pkg
May 26 09:18:09 Jerrolds-MacBook-Pro.local suhelperd (0)[165]: packageWithPath returned nil!
May 26 09:18:09 Jerrolds-MacBook-Pro.local Installer[34211]: SoftwareUpdate: Adopted /Volumes/OS X 10.9.3 Update Combo/OSXUpdCombo10.9.3.pkg
May 26 09:18:09 Jerrolds-MacBook-Pro.local softwareupdated (200)[163]: Rejecting register action from unauthorized client SUUpdateServiceClient pid=34211, uid=504, installAuth=YES rights=(system.install.software, com.apple.SoftwareUpdate.modify-settings), transactions=0 (/System/Library/CoreServices/Installer.app/Contents/MacOS/Installer)
May 26 09:18:09 Jerrolds-MacBook-Pro.local Installer[34211]: SoftwareUpdate: Error registering adopted product for post-logout install
May 26 09:18:09 Jerrolds-MacBook-Pro.local Installer[34211]: IFDInstallController 2B412FF0 state = 6
May 26 09:18:09 Jerrolds-MacBook-Pro.local Installer[34211]: Displaying 'Install Succeeded' UI.
May 26 09:19:57 Jerrolds-MacBook-Pro.local Installer[34211]: IFDCC: padded OS update package with 1341440
May 26 09:20:18 Jerrolds-MacBook-Pro.local softwareupdated (200)[163]: Removing client SUUpdateServiceClient pid=34211, uid=504, installAuth=YES rights=(system.install.software, com.apple.SoftwareUpdate.modify-settings), transactions=0 (/System/Library/CoreServices/Installer.app/Contents/MacOS/Installer)
May 26 09:22:38 Jerrolds-MacBook-Pro.local /System/Library/CoreServices/Software Update.app/Contents/Resources/softwareupdate_firstrun_tasks (200)[44]: swscan.apple.com is available: TRUE
May 26 09:22:38 Jerrolds-MacBook-Pro.local softwareupdated (200)[167]: softwareupdated: Starting with build 10.9.2 (13C1021)
May 26 09:22:43 Jerrolds-MacBook-Pro.local softwareupdated (200)[167]: Adding client SUUpdateServiceClient pid=44, uid=200, installAuth=NO rights=(), transactions=0 (/System/Library/CoreServices/Software Update.app/Contents/Resources/softwareupdate_firstrun_tasks)
(The full log shows boot at 9:22:06, so we're now in the post-boot environment and should be doing the final updates.  Things get messy from here on, but I don't see any real activity that seems to correspond to updating to 10.9.3.)
Anyone seen this behavior before?
                                                        -- Jerry

Answer 1

Please read this whole message before doing anything.
Back up all data. Quit the App Store application if it’s running. Test after each of the following steps until the problem is resolved.
Step 1
Triple-click anywhere in the line below on this page to select it:
/Library/Updates
Right-click or control-click the highlighted line and select
Services ▹ Reveal
from the contextual menu.* A Finder window should open with a folder selected. Move the contents of the selected folder to the Trash. You may be prompted for your administrator password.
*If you don't see the contextual menu item, copy the selected text to the Clipboard by pressing the key combination  command-C. In the Finder, select
Go ▹ Go to Folder...
from the menu bar and paste into the box that opens by pressing command-V. You won't see what you pasted because a line break is included. Press return.
Step 2
Do as in Step 1 with this line:
/Library/Preferences/com.apple.SoftwareUpdate.plist
Restart the computer. If there's no change, quit the App Store and restore the file you moved from your backup, overwriting the one that may have been created in its place. Otherwise, recreate your settings in the Software Update preference pane.
Step 3
Hold down the option key and select
Go ▹ Library
from the Finder menu bar. Move the following items from the Library folder to the Trash (some may not exist):
Caches/com.apple.SoftwareUpdate
Preferences/com.apple.SoftwareUpdate.plist
Preferences/ByHost/com.apple.SoftwareUpdate.*.plist
Saved Application State/com.apple.SoftwareUpdate.savedState
Here, "*" stand for a long string of letters, numbers, and dashes.
Step 4
If you still have problems, quit the App Store again.
Select this line and copy it to the Clipboard:
open $TMPDIR../C
Launch the built-in Terminal 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 Terminal in the icon grid.
Paste into the Terminal window. Depending on which web browser you use, you may have to press the return key. A folder should open. Inside that folder, there may be a subfolder with the name "com.apple.SoftwareUpdate". If so, delete it. You can then quit Terminal.