Issue as a noun revisited

4(a). A point or matter of discussion, debate, or dispute: legal and moral issues.

4(b). A matter of public concern: debated economic issues.

4(c). A misgiving, objection, or complaint: had issues with the plan to change the curriculum.

4(d). The essential point; crux: the issue of how to provide adequate child care.

4(e). A culminating point leading to a decision: bring a case to an issue.

5. (Informal) A personal problem or emotional disorder: The teacher discussed the child's issues with his parents.

... Am-Heritage:  http://www.thefreedictionary.com/issue

1. an important question that is in dispute and must be settled; 

• "the issue could be settled by requiring public education for everyone"; 
• "politicians never discuss the real issues"
  

3.  some situation or event that is thought about; 

• "he kept drifting off the topic"; 
• "he had been thinking about the subject for several years"; 
• "it is a matter for the police"
  

... Thesaurus/Word Net 3.0: http://www.thefreedictionary.com/issue