diff --git a/dDashboardServer/DashboardServer.cpp b/dDashboardServer/DashboardServer.cpp
index 3f00708ac..0710815cb 100644
--- a/dDashboardServer/DashboardServer.cpp
+++ b/dDashboardServer/DashboardServer.cpp
@@ -229,6 +229,7 @@ namespace {
 			info.ip = instance.ip.string;
 			info.port = instance.port;
 			info.isPrivate = instance.isPrivate != 0;
+			info.outdated = instance.outdated != 0;
 			info.zoneName = GameText::ZoneName(info.mapID);
 			AddPropertyDetails(info);
 			using eState = MasterPackets::ServerListResponse::eState;
diff --git a/dDashboardServer/routes/LiveWorld.cpp b/dDashboardServer/routes/LiveWorld.cpp
index 984ad7baa..4f1e550cf 100644
--- a/dDashboardServer/routes/LiveWorld.cpp
+++ b/dDashboardServer/routes/LiveWorld.cpp
@@ -253,13 +253,13 @@ namespace LiveWorld {
 				for (const auto& w : ServerState::g_WorldInstances) {
 					worlds.push_back({ {"mapID", w.mapID}, {"zoneName", GameText::ZoneName(w.mapID)}, {"instanceID", w.instanceID}, {"cloneID", w.cloneID}, {"players", w.players},
 						{"isPrivate", w.isPrivate}, {"ip", w.ip}, {"port", w.port}, {"propertyId", w.propertyId}, {"propertyName", w.propertyName},
-						{"ownerId", w.ownerId}, {"ownerName", w.ownerName}, {"state", w.state} });
+						{"ownerId", w.ownerId}, {"ownerName", w.ownerName}, {"state", w.state}, {"outdated", w.outdated} });
 				}
 				// Launched but not connected yet, or shutting down
 				for (const auto& w : ServerState::g_PendingWorlds) {
 					worlds.push_back({ {"mapID", w.mapID}, {"zoneName", GameText::ZoneName(w.mapID)}, {"instanceID", w.instanceID}, {"cloneID", w.cloneID}, {"players", 0},
 						{"isPrivate", w.isPrivate}, {"ip", w.ip}, {"port", w.port}, {"propertyId", w.propertyId}, {"propertyName", w.propertyName},
-						{"ownerId", w.ownerId}, {"ownerName", w.ownerName}, {"state", w.state} });
+						{"ownerId", w.ownerId}, {"ownerName", w.ownerName}, {"state", w.state}, {"outdated", w.outdated} });
 				}
 				JsonSuccess(reply, { {"worlds", worlds} });
 			});
diff --git a/dDashboardServer/routes/ServerState.h b/dDashboardServer/routes/ServerState.h
index c28258208..6acdec293 100644
--- a/dDashboardServer/routes/ServerState.h
+++ b/dDashboardServer/routes/ServerState.h
@@ -42,6 +42,8 @@ struct WorldInstanceInfo {
 	// "starting" (launched, not connected yet) or "stopping" (in g_PendingWorlds), or "draining" for a world that is up
 	// but whose players are being moved to a new instance (in g_WorldInstances); empty for one that is just up
 	std::string state{};
+	// On an old binary or old zone files (a live update or world reload): takes nobody new and stops once empty
+	bool outdated{false};
 };
 
 // Where a server listens and the machine it runs on, from master's server list
@@ -88,7 +90,8 @@ namespace ServerState {
 				{"players", world.players},
 				{"isPrivate", world.isPrivate},
 				{"zoneName", world.zoneName},
-				{"state", world.state}
+				{"state", world.state},
+				{"outdated", world.outdated}
 			});
 		}
 
diff --git a/dDashboardServer/templates/index.jinja2 b/dDashboardServer/templates/index.jinja2
index 0161aee90..a6f443002 100644
--- a/dDashboardServer/templates/index.jinja2
+++ b/dDashboardServer/templates/index.jinja2
@@ -60,8 +60,9 @@
 				<p class="small text-body-secondary">Moves everything onto the server binaries on disk now, without a restart: the UGC server finishes its jobs
 					and restarts, auth restarts (logins pause for a few seconds), chat hands its teams over and restarts, every world instance is
 					replaced by a new one and its players are moved there (the game's Mythran maintenance warning, then a short loading screen), and
-					the dashboard restarts last. Properties are saved before their new instance loads them; races and minigames finish first.
-					Master keeps running: updating master itself takes a normal restart.</p>
+					the dashboard restarts last. Races and minigames finish first. <strong>Properties are not moved</strong> (building in progress
+					isn't saved): their players are told an update is waiting, and a property updates once everyone has left it. Instances on the old
+					build take nobody new. Master keeps running: updating master itself takes a normal restart.</p>
 				<div class="d-flex flex-wrap gap-2 align-items-center mb-2" id="liveUpdateForm">
 					<div class="input-group input-group-sm" style="max-width: 20rem">
 						<span class="input-group-text">Warn players</span>
@@ -214,6 +215,9 @@ $(function () {
 		if (row.state === 'starting') return ' ' + fmt.badge('Starting', 'info');
 		if (row.state === 'stopping') return ' ' + fmt.badge('Shutting down', 'secondary');
 		if (row.state === 'draining') return ' ' + fmt.badge('Moving players', 'warning');
+		// Old binary or old zone files: nobody new goes there; it stops once the players still there have left
+		if (row.outdated) return ' ' + fmt.badge('Draining (old version)', 'warning') + ' <span class="small text-body-secondary text-nowrap">' +
+			Number(row.players || 0).toLocaleString() + ' player(s) still there</span>';
 		return '';
 	}
 	// Zone names in the viewer's language (the live status carries the server's)
diff --git a/dDashboardServer/templates/instances.jinja2 b/dDashboardServer/templates/instances.jinja2
index 9657801a7..8bd13c330 100644
--- a/dDashboardServer/templates/instances.jinja2
+++ b/dDashboardServer/templates/instances.jinja2
@@ -90,7 +90,9 @@
 	<div class="card-body">
 		<p class="small text-body-secondary">The zone files each running world loaded (<code>.luz</code>, <code>.lvl</code>, <code>.lutriggers</code>, terrain,
 			navmesh). When one changes on disk, the master server replaces the instances that loaded the old version with new ones and moves their
-			players over. <strong>Reload</strong> does the same for every instance of a zone now. Files read from the client's packs are not watched.</p>
+			players over. <strong>Reload</strong> does the same for every instance of a zone now. <strong>Properties are not moved</strong> (building in
+			progress isn't saved): an instance of a property on old files takes nobody new, its players are told an update is waiting, and it updates
+			once everyone has left. Files read from the client's packs are not watched.</p>
 		<div id="worldFilesZones"><p class="text-body-secondary mb-0">Waiting for the master server&hellip;</p></div>
 	</div>
 </div>
@@ -257,7 +259,8 @@
 				(z.changed ? ' ' + fmt.badge('changed on disk', 'warning') : '') + '</h6>' +
 				'<button type="button" class="btn btn-outline-primary btn-sm" data-reload-zone="' + esc(z.zone) + '">Reload</button></div>';
 			var instances = '<div class="small mb-1">' + z.instances.map(function (i) {
-				var badges = (i.stale ? ' ' + fmt.badge('old files', 'warning') : '') + (i.reloading ? ' ' + fmt.badge('being replaced', 'info') : '');
+				var badges = (i.stale ? ' ' + fmt.badge('old files', 'warning') : '') + (i.reloading ? ' ' + fmt.badge('being replaced', 'info') :
+					i.outdated ? ' ' + fmt.badge(i.clone ? 'updates when empty' : 'draining (old version)', 'secondary') : '');
 				return '<span class="me-3 text-nowrap">Instance ' + esc(i.instance) + (i.clone ? ' (clone ' + esc(i.clone) + ')' : '') + ', ' +
 					nf.format(i.players) + ' player(s)' + badges + '</span>';
 			}).join('') + '</div>';