You can now have your WordPress blog as a full-blown issue tracker with Recently updated Resolved/Unresolved Posts Plugin. Test it live here in this post. Check Resolved/Unresolved button at the top right corner of this post.
- Green posts are resolved issues.
- Red posts are unresolved issues.
You also get a sidebar widget for quick overview of resolved and unresolved posts.
Source: http://kovshenin.com/2012/wordpress-as-an-issue-tracker/