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/