GitHub has announced write support for Subversion, enabling developers and designers to collaborate on Git projects using existing SVN tools like Versions or Tortoise SVN. Users can access Subversion functionality by using their GitHub credentials on a Subversion URL, although it is recommended to check out projects from github.com rather than svn.github.com. While this update facilitates collaboration, users might encounter issues such as unusual merge histories and limited functionality with annotations and certain types of diffs. The feature currently only allows checkout of entire repositories and the default branch, requiring a 'master' branch to be present. This new capability is still in beta, implying a certain level of risk when using Subversion to modify code, and users are encouraged to test its suitability for their needs.