See http://blog.stackoverflow.com/2013/06/the-war-of-the-closes/
- “On hold” will replace “closed” on newly closed posts
- New close reasons are nicer and clearer
- “not constructive” and “not a real question” are replaced by "too broad", "unclear what you’re asking", "primarily opinion based"
- “Off-Topic” now includes site-specific close reasons
- Duplicates now focus on redirection to the answers you need
- Questions edited by the original poster automatically go to the re-open queue
Lots of good ones there for this SE! I'm not sure what "site-specific close reasons" would be on this SE though. Is there any clear thematic pattern to questions closed as off-topic?