The release candidate is the current state of the SVN and contains compared to RC1 a lot of bug fixes, a rewritten and simplified categories module and an improved upgrade for users of Postnuke .764.
There are 3 packages available:
The core pack contains only the bare system and no content modules. It's supposed to serve as the basis for a new site. So you only have to upload all the modules you personally need.
The value addons contain all the content modules from .7x in their latest version fit for .8. So if you need Quotes or FAQ for your site, this is the place to find them.
The upgrade pack contains everything you need to update an existing .764 site. It is the core pack and the value addons in one package. Please note: DO NOT UPGRADE YOUR LIVE SITE.
This is still not a final release and is not supposed to be used in live enviroments. If you intend to upgrade your site with the final version you should test the upgrade with the RC2 and a
local copy of your .764 site.
Please test!. The more you test now with the RC2 and the more bugs you report, the less trouble you will have with the final version.
The upgrade will only work for .764 sites. If your site is based on an older version this is the time to start your upgrade. If you have any questions about the update, visit the forums.
There will be no major changes from RC2 to the final release. The RC is bug fix only. If you intend to write modules, themes aso for Postnuke .8 you can start working with this RC.