Service Studio 6.0.1.7 (Released)

Service Studio 6.0.1.7 (Released)

  
http://www.outsystems.com/NetworkDocuments/DownloadsEntry.aspx?VirtualDirectoryId=60


1) "Support for Null and Nillable parameters and attributes",  what does this do?
2) There is a bug in 6.0.1.5 (release candidate), causing service studio to crash everytime a web service reference was added, was the bug fixed in the release of 6.0.1.7?