After updating to Ubuntu 12.10 I found that Kohana 2 don't work. I see only blank pages with 200 OK status (ob_end_flush in system/core/Kohana.php don't calling).
So, is it possible to migrate to Kohana 3 with minimum project changes (all developers of this project will be using Kohana 2 and we use one svn, so I don't want to broke their versions and production that deploys from the same svn)?