1. The async element of the singleFile or store tag is enabled in the serialized XML, even if it is disabled in 6.0 config xml (leftover from JDG-387). Empty write-behind tag appears which enables the async for the store.
2. The l1 tag is not serialized to new version (leftover from JDG-351).
3.The global site element is not serialized to new version (leftover from JDG-381).