--- a/aircraft_cmd.c	Tue Feb 27 15:51:52 2007 +0000
+++ b/aircraft_cmd.c	Tue Feb 27 16:23:02 2007 +0000
@@ -1212,14 +1212,39 @@
 
 	order = GetVehicleOrder(v, v->cur_order_index);
 
-	if (order == NULL) {
-		v->current_order.type = OT_NOTHING;
-		v->current_order.flags = 0;
+	if (order == NULL|| (order->type == OT_DUMMY && !CheckForValidOrders(v))) {
+		/*
+		 * We do not have an order. This can be divided into two cases:
+		 * 1) we are heading to an invalid station. In this case we must
+		 *    find another airport to go to. If there is nowhere to go,
+		 *    we will destroy the aircraft as it otherwise will enter
+		 *    the holding pattern for the first airport, which can cause
+		 *    the plane to go into an undefined state when building an
+		 *    airport with the same StationID.
+		 * 2) we are (still) heading to a (still) valid airport, then we
+		 *    can continue going there. This can happen when you are
+		 *    changing the aircraft's orders while in-flight or in for
+		 *    example a depot. However, when we have a current order to
+		 *    go to a depot, we have to keep that order so the aircraft
+		 *    actually stops.
+		 */
+		const Station *st = GetStation(v->u.air.targetairport);
+		if (!IsValidStation(st) || st->airport_tile == 0) {
+			int32 ret;
+			PlayerID old_player = _current_player;
+
+			_current_player = v->owner;
+			ret = DoCommand(v->tile, v->index, 0, DC_EXEC, CMD_SEND_AIRCRAFT_TO_HANGAR);
+			_current_player = old_player;
+
+			if (CmdFailed(ret)) CrashAirplane(v);
+		} else if (v->current_order.type != OT_GOTO_DEPOT) {
+			v->current_order.type = OT_NOTHING;
+			v->current_order.flags = 0;
+		}
 		return;
 	}
 
-	if (order->type == OT_DUMMY && !CheckForValidOrders(v)) CrashAirplane(v);
-
 	if (order->type  == v->current_order.type  &&
 			order->flags == v->current_order.flags &&
 			order->dest  == v->current_order.dest)

--- a/newgrf_gui.c	Tue Feb 27 15:51:52 2007 +0000
+++ b/newgrf_gui.c	Tue Feb 27 16:23:02 2007 +0000
@@ -465,6 +465,9 @@
 			break;
 
 		case WE_DESTROY:
+			if (!WP(w, newgrf_d).execute) {
+				CopyGRFConfigList(WP(w, newgrf_d).orig_list, *WP(w, newgrf_d).list);
+			}
 			/* Remove the temporary copy of grf-list used in window */
 			ClearGRFConfigList(WP(w, newgrf_d).list);
 			break;

--- a/video/cocoa_v.m	Tue Feb 27 15:51:52 2007 +0000
+++ b/video/cocoa_v.m	Tue Feb 27 16:23:02 2007 +0000
@@ -503,12 +503,12 @@
 			break;
 
 		case NSLeftMouseDown:
+			pt = QZ_GetMouseLocation(event);
 			if (!([ event modifierFlags ] & NSCommandKeyMask) ||
 					!QZ_MouseIsInsideView(&pt)) {
 				[NSApp sendEvent:event];
 			}
 
-			pt = QZ_GetMouseLocation(event);
 			if (!QZ_MouseIsInsideView(&pt)) {
 				QZ_ShowMouse();
 				break;

--- a/win32.c	Tue Feb 27 15:51:52 2007 +0000
+++ b/win32.c	Tue Feb 27 16:23:02 2007 +0000
@@ -662,8 +662,11 @@
 		d = dir_calloc();
 		if (d != NULL) {
 			wchar_t search_path[MAX_PATH];
-			/* build search path for FindFirstFile */
-			_snwprintf(search_path, lengthof(search_path), L"%s\\*", path);
+			bool slash = path[wcslen(path) - 1] == L'\\';
+
+			/* build search path for FindFirstFile, try not to append additional slashes
+			 * as it throws Win9x off its groove for root directories */
+			_snwprintf(search_path, lengthof(search_path), L"%s%s*", path, slash ? L"" : L"\\");
 			*lastof(search_path) = '\0';
 			d->hFind = FindFirstFileW(search_path, &d->fd);