Version 0.43 is out, changes:

• Better nesting of groups if they get created together (due to re-caching)
• 3x faster performance during comparison of members in a full sync
• .NET streamwriter vs Add-Content logging (to prevent missing log entries when the filesystem is slow)
• Changed the differential switch to ‘do a differential’ instead of ‘do only a differential’
• Added the full switch
• Allow X500 proxy addresses to sync

Get it here