I recall that we have had a few issues with that WORDPRESS system – but do not recall details. But you should not expect us to know about or support other applications. We relate to the database and the content of the database alone! We have no clew about the contents of the milllions of applications around .. you will have to inform us!
If the structure (column types and order, charset, storage engine etc.) on both sides are not identical the sync will refuse to start! Once it has started it should finish.
Can you provide a test case with a zipped dump from both servers. You can crate a ticket if you want privacy. And please not much too big! In principle a single row that fails to sync is enough!
Alternative provide download links and a step-by-step instruction on how to reproduce this!
Also tell the EXACT server versions! Not 4.1 but 4.1.10 or 4.1.22 … and both source and target.
I also think you should try 6.12. Just to be sure .. but frankly I do not think this is an issue that has been resolved between 6.1 and 6.12!
