SnotlinG,
it does not happen repeatedly, it lasts. The icons just never appeared again. In both games (they are exactly my 0.91 ones).
I don't care about a game vs AI (it was OK a few days ago when I was making 10+ turns there, when I wasn't in for 2 days or so and after that I found icons missing). But it makes the just started one,
http://www.warbarons.com/ver091/game.ph ... es=highres
unplayable, maybe not now, since I didn't need to search any ruins yet and have only one city, but in the future it would be a problem.
I just found that if I move my mouse exactly on the border of window, it is possible to click those unseen buttons. But for me, it is is nearly impossible to be that precise with my mouse.