Apparently when I had just started and didn't know what I was doing I joined a game and navigated away without either leaving or starting it. In the previous version I got an "undecided games" message that took me to a screen for a full game where I couldn't do anything useful, not even officially leave, but I never got around to reporting it since I could just close the first message and proceed without trouble.
From today with the re-skin I get that "Undecided Games" message, reading "You have joined at least 1 game without deciding to join it or leave it. To make it easier get new games please either click leave or pick a color and click the ready button to participate in the game.", and a "Take me there" button but no ability to close that box except by clicking Take me there.
Clicking Take me there takes me to a blank game lobby with an Error Message box of "Sorry, game is full and will start soon". Url at the top for this is http://www.warbarons.com/gamelobby.php?lobbyid=2152. There's an X available in this error message but clicking it does nothing, and as before there's no visible way to leave the game in any case.
So, admitting this is ultimately my fault for not reporting sooner, I'm effectively locked out of the My Games screen. Moreover, clicking in directly from e-mail, even while logged in, is oddly hit and miss. Two games work, but three others don't (3262, 3268, and 3297).