If a synchronized field subsequently has "Enable Translation" set (Edit field => Field settings => Field translation) - which seems to be the only way to remove synchronization - then obviously it is no longer synchronized, however, it is still shown as being synchronized on the "Synchronized Translation" Tab. (The tab effectively shows what would be synched if it wasn't being translated!).
see also http://drupal.org/node/1989306 (support request superceded by this bug report - hope that's the right way to do it)
Comments
Comment #1
jose reyero commentedSynchronization is intended only for fields that are not translated. You can just unmark the field for not being synchronized.
Having both options enabled in the same field, may cause unexpected results and we have no plans to support such usage. So this is one of that "use at your own risk..."
Comment #2
Infoloko commentedYes, understood and no axe to grind (!) but that doesn't really offer a solution to the original problem - how to 'unsynchronize' a previously synchronized (and populated) field. In my (surely not unique) case I had a design where the field did not need translation so it was synchronized - however, a subsequent design change required it to become translated but the field had already been populated in a significant number of records. So I either have to delete all the synchronized data and start again (sorry about this but "no way Jose") or .. what? Sorry if I seem to be labouring the point especially as you may gather from my original post I've got around the problem but I'm sure this will crop up again with other users.