On beta labs,
- make sure you're in Topics and Posts view
- choose a topic that isn't collapsed
- Close topic
- Then reload the page.
The closed topic appears white with "This topic closed by <USER>" and is collapsed.
Now Reopen topic.
The closed topic redisplays gray. But it remains collapsed.
- In at least this circumstance (viewing topics and posts, topic wasn't collapsed before), reopening a topic should expand it so you see its posts.
- For bonus points, have nice animation of expansion and transition from closed white to normal gray.