I was in my Asia Pacific map when I realized EVERYTHING in Australia didn't work worth beans, so I went up north and tried to bring units down.
They WOULD NOT cross an "invisible" barrior that just happened to be the exact WIDTH of the map. With just the mouse I estimated they were being blocked around pos 11256 and the map width is 11264.
Below 11256 or 11264 units could not function at all. More often they'd just spin in place, which is interesting to see your commander doing

I got a movie of it, please note my cursor location is where I'm right clicking to move the unit to, but the path only shows up to the "Mysterious Wall"
http://www.epicedit.com/pathfinding.avi
What's more, is I can see it's a bug, but I have no idea how to fix it, pathfinding is not my forte

-Buggi