[Freeciv-Dev] (PR#2789) Units sometimes remain displayed in fog of war

["Guest via RT" <rt@xxxxxxxxxxxxxx>]

Sometimes, enemy units remain displayed in the fog of war. This is
usually after a unit has attacked, or a ship has unloaded during the
enemy move turn.  For instance, if an enemy ship is in the fog of war,
but unloads a unit within my view range, the enemy ship remains visible.
 If I move away from the enemy ship in my turn, it remains displayed in
the fog of war square.

I'm using CVS from Jan 5, gtk2 client on RH8.  A savegame is available
at http://kenn-michelle.ca:8080/freeciv/fog.sav.gz (should I attach
savegames to here?.. they can be big).  Join as kenn.  Note area around
Ottawa.  End turn.  Note the enemy ship next to Ottawa.  Move destroyer
away from that area.  Wait a turn.  Move destroyer back to that area. 
The enemy ship is still displayed, and you can even move on top of it,
although it isn't actually there.

Kenn