Although we are already working on next major release 0.7, we decided to publish a second beta for 0.6 version. It is already a long time we are working on improving functionalities and stability of this version and this release marks our final point of achievement for 0.6 series. This beta is fully operational.
Experimental features like dynamic timeline are finally not included in this build because they are not ready yet.
Because we prefer concentrate on the new 0.7 version, no official 0.6 version will show up.
See precedent releases notes for more details about functionalities: 0.6beta1, 0.6alpha2 and 0.6alpha1