Settings window causes unresponsive client post-game.

1. Start game
2. Get annoyed with notifications during game
3. Try to open beta client's settings during game (it does not open)
4. Close a club chat window
5. Game ends; post-game screen opens
6. Setting window opens on its own
7. Check a box, decide against it, uncheck it
8. Switch tabs a couple tabs, end in the Interface tab
9. Close settings
10. Entire client darkens and becomes unresponsive.

Dunno if that helps, but that's what happened.