The above post mentions that the problem has been resolved, yet I have the same issue, when creating new topic status, I see [] next to its name.

Like [] Topic title.

Also how do I add new icons for the new topic statuses?

Are you using YAF in a Portal (e.g. DotNetNuke)?

To add Topic Status. Host Administration > Settings > Topic Status

Then edit your themeName.xml file to add icons to them.

<page name="TOPIC_STATUS">
     <Resource tag="INFORMATIC">~/status_informatic.png</Resource>
     <Resource tag="SOLVED">~/status_solved.png</Resource>
     <Resource tag="QUESTION">~/status_question.png</Resource>
	 <Resource tag="ISSUE">~/status_issue.png</Resource>
	 <Resource tag="FIXED">~/status_fixed.png</Resource>
  </page>  

The icon will have to be in your theme directory with the other theme icons/graphics/images.

http://yetanotherforum.net/forum/posts/m52938-Using-tags-in-topic-title--how-to-highlight-one#post52938