diff --git a/copyparty/web/browser.js b/copyparty/web/browser.js
index 7ec2ee66..685b5b18 100644
--- a/copyparty/web/browser.js
+++ b/copyparty/web/browser.js
@@ -1287,7 +1287,7 @@ function MPlayer() {
 	r.ftimer = null;
 	r.fade_in = function () {
 		r.fvol = 0;
-		r.fdir = 0.025;
+		r.fdir = 0.025 * r.vol * (CHROME ? 1.5 : 1);
 		if (r.au) {
 			r.ftid = r.au.tid;
 			r.au.play();
@@ -1297,7 +1297,7 @@ function MPlayer() {
 	};
 	r.fade_out = function () {
 		r.fvol = r.vol;
-		r.fdir = -0.05;
+		r.fdir = -0.05 * r.vol * (CHROME ? 2 : 1);
 		r.ftid = r.au.tid;
 		fader();
 	};
@@ -1312,14 +1312,14 @@ function MPlayer() {
 			return;
 
 		var done = true;
-		r.fvol += r.fdir;
+		r.fvol += r.fdir / (r.fdir < 0 && r.fvol < r.vol / 4 ? 2 : 1);
 		if (r.fvol < 0) {
 			r.fvol = 0;
 			r.au.pause();
 			mpl.pp();
 
 			var t = mp.au.currentTime - 0.8;
-			if (isFinite(t))
+			if (isNum(t))
 				mp.au.currentTime = Math.max(t, 0);
 		}
 		else if (r.fvol > r.vol)
@@ -1569,7 +1569,7 @@ var pbar = (function () {
 
 		pctx.clearRect(0, 0, pc.w, pc.h);
 
-		if (!mp || !mp.au || isNaN(adur = mp.au.duration) || isNaN(apos = mp.au.currentTime) || apos < 0 || adur < apos)
+		if (!mp || !mp.au || !isNum(adur = mp.au.duration) || !isNum(apos = mp.au.currentTime) || apos < 0 || adur < apos)
 			return;  // not-init || unsupp-codec
 
 		var sm = bc.w * 1.0 / adur,
@@ -1724,7 +1724,7 @@ function seek_au_sec(seek) {
 		return;
 
 	console.log('seek: ' + seek);
-	if (!isFinite(seek))
+	if (!isNum(seek))
 		return;
 
 	mp.au.currentTime = seek;
@@ -2108,7 +2108,7 @@ var audio_eq = (function () {
 				vs = that.value,
 				v = parseFloat(vs);
 
-			if (isNaN(v) || v + '' != vs)
+			if (!isNum(v) || v + '' != vs)
 				throw new Error('inval band');
 
 			if (sb == 'amp')
@@ -2251,6 +2251,9 @@ function play(tid, is_ev, seek) {
 		mp.au.onprogress = pbar.drawpos;
 		mp.au.onplaying = mpui.progress_updater;
 		mp.au.onended = next_song;
+		t = mp.au.currentTime;
+		if (isNum(t) && t > 0.1)
+			mp.au.currentTime = 0;
 	}
 	else
 		mp.au.src = mp.au.rsrc = url;
@@ -5054,7 +5057,7 @@ var treectl = (function () {
 	function scaletree(e) {
 		ev(e);
 		treesz += parseInt(this.getAttribute("step"));
-		if (isNaN(treesz))
+		if (!isNum(treesz))
 			treesz = 16;
 
 		treesz = clamp(treesz, 2, 120);
diff --git a/copyparty/web/up2k.js b/copyparty/web/up2k.js
index 92c4c5ed..80495266 100644
--- a/copyparty/web/up2k.js
+++ b/copyparty/web/up2k.js
@@ -2106,7 +2106,7 @@ function up2k_init(subtle) {
                         spd2 = (t.size / ((t.t_uploaded - t.t_uploading) / 1000.)) / (1024 * 1024.);
 
                     pvis.seth(t.n, 2, 'hash {0}, up {1} MB/s'.format(
-                        f2f(spd1, 2), isNaN(spd2) ? '--' : f2f(spd2, 2)));
+                        f2f(spd1, 2), !isNum(spd2) ? '--' : f2f(spd2, 2)));
 
                     pvis.move(t.n, 'ok');
                     if (!pvis.ctr.bz && !pvis.ctr.q)
diff --git a/copyparty/web/util.js b/copyparty/web/util.js
index ba29e514..c8044385 100644
--- a/copyparty/web/util.js
+++ b/copyparty/web/util.js
@@ -108,7 +108,7 @@ catch (ex) {
         console.log = console.stdlog;
     console.log('console capture failed', ex);
 }
-var crashed = false, ignexd = {};
+var crashed = false, ignexd = {}, evalex_fatal = false;
 function vis_exh(msg, url, lineNo, columnNo, error) {
     if ((msg + '').indexOf('ResizeObserver') + 1)
         return;  // chrome issue 809574 (benign, from <video>)
@@ -119,7 +119,7 @@ function vis_exh(msg, url, lineNo, columnNo, error) {
     if (!/\.js($|\?)/.exec('' + url))
         return;  // chrome debugger
 
-    if ((url + '').indexOf(' > eval') + 1)
+    if ((url + '').indexOf(' > eval') + 1 && !evalex_fatal)
         return;  // md timer
 
     var ekey = url + '\n' + lineNo + '\n' + msg;
@@ -649,6 +649,14 @@ function s2ms(s) {
 }
 
 
+var isNum = function (v) {
+    var n = parseFloat(v);
+    return !isNaN(v - n) && n === v;
+};
+if (window.Number)
+    isNum = Number.isFinite;
+
+
 function f2f(val, nd) {
     // 10.toFixed(1) returns 10.00 for certain values of 10
     val = (val * Math.pow(10, nd)).toFixed(0).split('.')[0];
@@ -1406,8 +1414,10 @@ function repl(e) {
         if (!cmd)
             return toast.inf(3, 'eval aborted');
 
-        if (cmd.startsWith(','))
-            return modal.alert(esc(eval(cmd.slice(1)) + ''))
+        if (cmd.startsWith(',')) {
+            evalex_fatal = true;
+            return modal.alert(esc(eval(cmd.slice(1)) + ''));
+        }
 
         try {
             modal.alert(esc(eval(cmd) + ''));