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Refer to http://doc.tiki.org/Tiki10 and the Tiki 10.0 Release Notes for information about this release. You can download the Tiki 10.0 beta directly from Sourceforge.
Beta users can report issues or comments to the Tiki development team via the Developer Mailing List (http://tiki.org/Mailing+Lists) or submit a bug on the Tiki Development site (http://dev.tiki.org/Report+a+Bug).
The final release of Tiki 10.0 is planned later this year.