[Repeat of post on another thread on similar topic]
Here's part of the advice I got from support (finally!). It didn't help me (I tried S1 then S2). But maybe it will help someone else? Good luck:
Quote:
We have seen with 10.4.9 strange behavior, as the sync service were modified quite a bit by the new release. In some cases we asked users to completely reinstall SyncTogether. In some other cases removing the following files did fix the type of issue where even the reset of the sync history did not help. I've put up both solutions (S1 and S2)
S1
I will ask you to reinstall the software and do some repair on your drive. There is a sequence that you will need to respect to maximize the results.
First uninstall the software by using the uninstaller located in the SyncTogether folder.
Reset PRAM
Shut down your computer, as soon as you start your computer press and hold command-option-P-R keys simultaneously until you hear the chime start up sound 3 times. Then let go of the keys.
Start your computer in SAFE mode.
Restart your computer, as soon as you do, press and hold the shift key until you see "starting in safe mode" (you can then let go of the key). Let it start completely. The safe mode will run diagnostic applications in the background and fix any problem with the startup disk. Once this is done, just restart your computer and don't hold any keys.
Repair disk and permission
Use the Disk Utility application located in the Utility folder. Select your hard drive and use the verify and repair button for permission and disk. That will check your system for errors and correct them if it is necessary. You may need to start from the CD/DVD that came with your system to use Disk Utility application if you get the message that the errors can't be fix using the application from the HD.
Now reinstall the software.
S2
You will need to delete the following files and folders from all the server and clients (on all accounts on all computers)
Go to the Users/<user>/Library/Application Support/SyncTogether folder and delete the whole content of the folder.
The folder contain those files and folders.
Archive
Inbound
MySyncClientDescription.plist
PersistentStore
SyncNodes.xml
SyncTogetherClientDescription.plist
Delete also the Preference file, com.markspace.synctogether.plist from Users/<user>/Library/Preferences folder.
This means that you will have to recreate the network name on the server and recreate your clients.
Now, go back to the server account, create your network, we suggest to use only lower case when you create the Network. (Keep the application running on the server account). Go the the client accounts on the same computer as the server account, add each client to the “Join an existing lcoal group” (do not create a new group). On the remote client do the same, be sure to have all instances of the SyncTogether application running on all “syncable” accounts.