Empty drop down fields in startup and workflow sections of synchronization editor.
The fields "Synchronization Direction" and "Revisioning filtering" on the dialog for startup config should show a value in read only mode as well.(For example when there are fixed values configured for the workflow).
This is a product defect (28089)
This will be fixed on a future release of the product. If you require this immediately corrected, please contact support for a hotfix referencing the defect ID 28089.