Given the relatively minimal usage that the Project Management and Issue Tracking features hosted here had, and the fact that Google Code already offered these features (which made hosting them here redundant), they have now been disabled.
These resources increased the resource utilisation of the site unnecessarily, also had quite a lot of outdated/irrelevant content that was not updated as quickly as I would have liked it to have been - given the highly fluid structure of the project and it's codebase.

A subset of this functionality is available at http://code.google.com/p/i9os/issues/.