I found a way to recombine the fractured places in FTM2012 using Fact Data Options but it seems needlessly tedious.
1. Find a place with an unbalanced ")" in the name, e.g., "sud), Ontario, Canada". You can do this by browsing the list of places (a wildcard or, even better, a regular expression search on the list would be more effective but are unsupported). Alternatively, you can use Edit > Find and pick a likely fact type such as Residence and do a wildcard search on "*)*" and browse the search results.
2. Either way you need to pick a person and go to the Person view.
3. Select the fact having the fractured place name, e.g.: Place / Description = "sud), Ontario, Canada; Kingsville (Village), Essex (south". (note the semi-colon is the separator on screen).
4. You could edit this one instance in the right panel but there may be more of the same so click on Options > Fact data options > acknowledge the back-up prompt as you see fit > and arrive at the screen FactType "Fact Data Options".
5. In this screen, select "Show facts for:" "All inidviduals" > longer list and "Uncheck all". Click on the Place header to sort the list by place and scroll down to find the cluster of facts in "sud), Ontario, Canada". Check all these facts.
6. Check the box for "Move data in the selected facts" and the option "Swap place and description" > OK
7. After processing, you will be back at the Person view and Place / Description now = "Kingsville (Village), Essex (south; sud), Ontario, Canada" but the complete place is still fractured between the Place and Description fields. So, reiterate steps 4 and 5 except sort and scroll on the Description field to find the "sud)..." cluster and check them.
8. Check the box for "Move data in the selected facts" and the option "From description to place" > OK. Now the Place / Description line reads "Kingsville (Village), Essex (south/sud), Ontario, Canada" which is exactly what is shown in the Place field on the right hand side with the Description field blank.
Repeat for all such occurrences of fractured places.
Do not sync yet - it might undo things and certainly does not prevent it from happening again for these same facts. Better to proceed to standardize these place names without the slash characters and so that they can be geocoded and thus mapped. Then sync up to the Ancestry tree and, hopefully, that will lock down those facts so that their places will not be fractured again in a downward sync.