Connecting MB Pro w/OS 10.8.4 to other network computers hangs

I have updated my 2011 MB Pro to OS 10.8.4. I have an Airport Extreme network with 3 other desktop Macs connected - a Mac Pro, a G5, and an older iMac all runing a combination of Snow Leopard or Mountain Lion, but not the latest OS 10.8.4 update.
I can connect and share files from those older OS Mac desktops with each other and to the MB Pro. Trying to connect from the MB Pro to either desktop Mac hangs. In a nutshell - to the MB Pro is fine, from the MD Pro hangs. An icon for the selescted volume does appear on the MB Pro's desktop when try to access one of the desktops but the connection window stays open and I get the dreaded beach ball. Only answer is to shutdown the MB Pro, restart, and do the file sharing from the desktops to the MB Pro. That direction works okay.
I suspect there is something in the latest OS update that is causing the networking problem. Is there a fix? I could update the desltop Macs to OS 10.8.4 but am afraid I'll have no netwroking capability at that point. So, just checking to see if there is a known networking issue with OS 10.8.4, or perhaps a workaround.
Thanks Much!

Are you doing this via screen sharing?
On the MacBook Pro
Try a restart.
Do a backup, using either Time Machine or a cloning program, to ensure files/data can be recovered. Two backups are better than one.
Try setting up another admin user account to see if the same problem continues. If Back-to-My Mac is selected in System Preferences, the Guest account will not work. The intent is to see if it is specific to one account or a system wide problem. This account can be deleted later.
Isolating an issue by using another user account
If the problem is still there, try booting into the Safe Mode. Disconnect all peripherals except those needed for the test. Shut down the computer and then power it back up. Immediately after hearing the startup chime, hold down the shift key and continue to hold it until the gray Apple icon and a progress bar appear. The boot up is significantly slower than normal. This will reset some caches, forces a directory check, and disables all startup and login items, among other things. When you reboot normally, the initial reboot may be slower than normal. If the system operates normally, there may be 3rd party applications which are causing a problem. Try deleting/disabling the third party applications after a restart by using the application uninstaller. For each disable/delete, you will need to restart if you don't do them all at once.
Safe Mode
Safe Mode - About
General information.
Isolating issues in Mac OS X
Troubleshooting Permission Issues
Step by Step to Fix Your Mac

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