Index: route.t
==================================================================
--- route.t
+++ route.t
@@ -336,11 +336,13 @@
 			end
 		end
 	end
 	terra http.static_content(co: &lib.srv.convo, [filename], [flen])
 		var hdrs = array(
-		lib.http.header{'Content-Type',nil})
+			lib.http.header{'Content-Type',nil},
+			lib.http.header{'Cache-Control','max-age=2592000'} -- TODO immutable?
+		)
 		var [page] = lib.http.page {
 			respcode = 200;
 			headers = [lib.mem.ptr(lib.http.header)] {
 				ptr = &hdrs[0], ct = 1
 			}

Index: srv.t
==================================================================
--- srv.t
+++ srv.t
@@ -207,11 +207,11 @@
 			key = 'X-Live-Newest-Artifact';
 			value = lib.math.decstr(lastup, &nbuf[20]);
 		},
 		lib.http.header { key = 'Content-Length', value = '0' }
 	)
-	if self.live_last ~= 0 and self.live_last >= lastup then
+	if self.live_last ~= 0 and self.live_last == lastup then
 		lib.net.mg_printf(self.con, 'HTTP/1.1 %s', lib.http.codestr(200))
 		for i = 0, [hdrs.type.N] do
 			lib.net.mg_printf(self.con, '%s: %s\r\n', hdrs[i].key, hdrs[i].value)
 		end
 		lib.net.mg_printf(self.con, '\r\n')

Index: static/live.js
==================================================================
--- static/live.js
+++ static/live.js
@@ -31,11 +31,11 @@
 			})
 			
 			fetch(req).then(function(resp) {
 				if (!resp.ok) return;
 				let newest = parseInt(resp.headers.get('X-Live-Newest-Artifact'));
-				if (newest <= container._liveLastArrival) {
+				if (newest == container._liveLastArrival) { // != also handles some deletions
 					resp.body.cancel();
 					return;
 				}
 				container._liveLastArrival = newest