I've disabled the issue tracker on both Google Code and GitHub. The issue tracker has become people posting the same few items which are not issues over and over again. I spend more time closing invalid issues than doing anything else with Sigil. If you're having a problem with Sigil of some sort try searching Google. FYI, if you're using OS X chances are either the version you're using isn't supported or isn't supported at this time due to components Sigil depends on being broken on that version.