System Preferences Hangs After a Successful Sync to .Mac

Okay, I think this is going to be a tough one to track down, but I'm hoping you guys can help.
Problem: When I manually sync my data to .Mac using the .Mac area of System Preferences, System Preferences hangs right after the sync process completes.
If I manually start the sync in System Preferences and then quit System Preferences while the sync is in progress, the sync completes with no ill effects (i.e., because System Preferences is no longer running, it can't hang when the .Mac sync completes).
Things I've done to address the problem:
(1) Trashed com.apple.PreferenceSync.plist (restart system and try recreating the problem ... no change).
(2) Trashed the contents of ~/Library/FileSync/ (restart system and try recreating the problem ... no change).
(3) Unregister my computer from .Mac, delete old sync data, and re-register my computer with .Mac (as I said, the .Mac sync completes, so this was just a shot in the dark ... restart system and try recreating the problem ... no change).
The system.log records the following when System Preferences hangs:
Jun 7 00:07:31 Joel-McIntoshs-Computer System Preferences[401]: exception while performing selector syncPlanWithIdentifier: on server: NSPortTimeoutException connection timeout: did not receive reply
Jun 7 00:07:31 Joel-McIntoshs-Computer SystemUIServer[107]: exception while performing selector syncPlanWithIdentifier: on server: NSPortTimeoutException connection timeout: did not receive reply
Jun 7 00:07:31 Joel-McIntoshs-Computer System Preferences[401]: * -[NSConditionLock lockBeforeDate:]: deadlock (<NSConditionLock: 0x199997a0> '(null)')
Jun 7 00:07:31 Joel-McIntoshs-Computer System Preferences[401]: * Break on _NSLockError() to debug.

Thanks for the help. I think I've tracked down the problem.
I created a test user and the sync and system preferences worked fine.
I started trouble shooting by going back to the main account, and testing item by item various third-party "items" that were present in the main account, but that were absent in the test user account. I removed most third party "stuff" and started adding it back in one at a time and testing sync with each addition.
I finally recreated the System Preferences hang after I installed TextExpander -AND- had .Mac sync checked in the TextExpander preferences (it didn't hang if that box was not checked in TextExpander). Unchecked, no hang ... checked hang.
I've contacted the developer for assistance.

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