Did something change with the website? That would be the issue, not the browsers. Or, said a different way, if the browsers were the issue, this was caused by a website change.
I posted a turn at 11:02:08 PM Eastern Time on Friday, 11/13 where my opponent could not download the game. This is the second instance of this happening in my games. That link is given in the first post.
The first instance is here, with a posting at 10:25:41 PM Eastern Time on Friday, 11/13:
http://www.axisandallies.org/forums/index.php?topic=36748.45
From this time forward, no one can download a game. If someone has a time further back let us know so that we can pinpoint the exact time. But, I bet this will be darned close (a good estimate). It’s going on 48 hours now….