EPiServer CMS 6 RC1 supports upgrading from EPiServer CMS 5 R2, we have tested a couple of internal customers like EPiServer World and external customers that donated a copy of their site to us.
The upgrade process does a few notable things:
Known issues:
Things you need to know about an upgraded site:
Reporting problems:
If you want to help us to make this release rocking stable, please upgrade some of your sites as well. That way, if you find any issues in your environment, we can have them fixed and ready for you when we ship the release.
Merry Christmas.