Well, more specifically, I can’t visit threads. I go to a forum, I click on a thread, and it takes me to this:

Oops! You have left the battle!

Once you enter a forum, you may not navigate to another Forumwarz page without losing all your progress.

Also, the battle session is marked as inactive if you take longer than 60 minutes, so don’t go AFK in the middle of something!

This includes opening new tabs and new browser windows. You should be careful about doing so once you have entered battle, lest you might lose all of your progress. We recommend using only one browser window or tab to play Forumwarz.

You can find a link back to the Forum on your Recently Visited Bookmarks.

Obviously I haven’t actually got any tabs open, haven’t left battle, whatever, or I wouldn’t be reporting this.