Mark Pernotto answered a call in December to the Code4Lib list to help update the plugin to be compatible with WordPress 3.5 (at the time, it was still 3.4). His change represents the first update of the plugin since 2008.
Fork of Issue Manager plugin from Wordpress codex to GitHub
Current version 1.4.3 only tested on WordPress 3.0.4. Does not work in WP 3.4.