Anyone using 5.2.0RC1 is STRONGLY encouraged to upgrade to 5.2RC2. Click through for what has changed since 5.2RC1.
You can download a preview copy of C5 5.2 at SourceForge.
Concrete5 gets closer to 5.0 with a release that improves compatibility, tightens security, and does a lot more.
Learn what has changed between 5.2.0 and 5.2.1
5.0.0b2 improves compatibility and make it easier to install Concrete5 anywhere you've got PHP5.
Lots of bug fixes, much improved integration with TinyMCE, the addition of the optional breadcrumb toolbar, and more.