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vistrails-1-3The VisTrails development team is happy to announce the release of two new versions of VisTrails. Version 1.3 contains lots of new features, improvements and a new version of the user's guide. Version 1.2.2 contains lots of bug fixes and it's basically a maintenance release of version 1.2.1. Both versions come with updated versions of VTK (5.4.2) and matplotlib. For a more detailed description see the release notes below. Both versions may be downloaded from the VisTrails wiki.