I've checked the other bug reports and can't find anything that references similar, so hoefully this is not a duplicate.
Using Firefox and Windows 7 32bit.
6 players plus myself.
FOW map reveal has problems. Would select an area of map to reveal, that area would go white (to me) for 10 seconds, then the grid disappeared, then a messagebox telling me I had a slow running script would pop up asking me if I wanted to wait or terminate. If you select wait another 10 seconds passes and then the grid reappears and the area is revealed.