Today, with assistance from real34, utilizing AD7six's excellent migration tool, we have just completed the migration for all open tickets from Lighthouse to github. We are now in the process of archiving the project tracker and making it readonly for project members.
By moving the Issue Tracker to github, we hope to make a centralized place for the community to follow the project development as it offers better cross-referencing between issues, pull requests, and commit messages (even cross-project, eg CakePHP).
Lighthouse has been a great tool for us, and their support staff have always been quick and excellent when answering our questions and issues. We'd like to thank Lighthouse for their awesome service for these past few years