The "My tournaments" page is now listing all tournaments in the top section, not just the ones I've joined or been invited to.
In game http://www.wargear.net/games/view/405328 my remaining opponent just surrendered, but the game hasn't terminated. It shows as still being his turn, even though his status is "surrendered", and his territories are still showing his color.
The problem with "My Tournaments" has disappeared as mysteriously as it appeared.
And now the game is finished. After the surrendered opponent's turn timer expired, it became my turn and I was able to place units. When I clicked [Apply], the game ended.