The current release of dotProject is v2.1.1
We are working on a few odds and ends of bug fixes, some performance improvements and a greatly needed overhaul of some of the code in the Files Module (including sorting out permissions inconsistencies), and this will be released as 2.1.2 - we are hoping before Christmas, but this will depend greatly on the results of formal testing runs.
If you'd like to contribute to that effort please download the development snapshot for the 2.x tree from: http://dotproject.sourceforge.net/dotproject-stable_2.tar.bz2
and run your own testing / report any issues encountered at http://bugs.dotproject.net