Well, I was about to propose to go read the release notes that were published, but... I read them... Oups.
So, the major feature added is write with verify, with a enhanced support of DRT-DM (we're using the verify mmc command featured in DRT-DM capable devices, plus the capability of DRT-DM to report light defects before packets are damaged beyond CRC read correction). You have additionality a verification result summary when you format with verify. The medium new feature is InCD Reader, an evolution of EasyWrite Reader, which adds for free download UDF read capability up-to revision 2.50 for all supported OSes, plus DVD-RW -VR read capability. Maybe not so medium finally
Another new feature is FAT format for DVD-RAM on w2k and higher - so you will not need to use other software in parallel if you have some DVD-RAM with FAT format left or are working with someone needing FAT on DVD-RAM rather than UDF (UDF is still strongly recommended). We added support for the new fs filter model from Microsoft, so it should work better with anti-virus and encryption software which are typically fs filter drivers.
As always, bug fixes, especially thank to Windows Error Report program of winqual, and some tuning on performance.