diff --git a/copyparty/web/browser.js b/copyparty/web/browser.js
index a3303f0f..d75b4ee4 100644
--- a/copyparty/web/browser.js
+++ b/copyparty/web/browser.js
@@ -318,6 +318,8 @@ var Ls = {
 		"u_ehsfin": "server rejected the request to finalize upload; retrying...",
 		"u_ehssrch": "server rejected the request to perform search; retrying...",
 		"u_ehsinit": "server rejected the request to initiate upload; retrying...",
+		"u_eneths": "network error while performing upload handshake; retrying...",
+		"u_enethd": "network error while testing target existence; retrying...",
 		"u_ehsdf": "server ran out of disk space!\n\nwill keep retrying, in case someone\nfrees up enough space to continue",
 		"u_emtleak1": "it looks like your webbrowser may have a memory leak;\nplease",
 		"u_emtleak2": ' <a href="{0}">switch to https (recommended)</a> or ',
@@ -662,6 +664,8 @@ var Ls = {
 		"u_ehsfin": "server nektet forespørselen om å ferdigstille filen; prøver igjen...",
 		"u_ehssrch": "server nektet forespørselen om å utføre søk; prøver igjen...",
 		"u_ehsinit": "server nektet forespørselen om å begynne en ny opplastning; prøver igjen...",
+		"u_eneths": "et problem med nettverket gjorde at avtale om opplastning ikke kunne inngås; prøver igjen...",
+		"u_enethd": "et problem med nettverket gjorde at filsjekk ikke kunne utføres; prøver igjen...",
 		"u_ehsdf": "serveren er full!\n\nprøver igjen regelmessig,\ni tilfelle noen rydder litt...",
 		"u_emtleak1": "uff, det er mulig at nettleseren din har en minnelekkasje...\nForeslår",
 		"u_emtleak2": ' helst at du <a href="{0}">bytter til https</a>, eller ',
@@ -4495,7 +4499,7 @@ function aligngriditems() {
 	var gridwidth = ebi('ggrid').clientWidth;
 	var griditemcount = ebi('ggrid').children.length;
 	var totalgapwidth = em2px * griditemcount;
-	
+
 	if (((griditemcount * em2px) * gridsz) + totalgapwidth < gridwidth) {
 		ebi('ggrid').style.justifyContent = 'left';
 	} else if (localStorage.getItem('entreed') == 'na') {
@@ -4694,7 +4698,7 @@ var treectl = (function () {
 
 	function onresize(e) {
 		aligngriditems();
-	
+
 		if (!entreed || r.hidden)
 			return;
 
diff --git a/copyparty/web/up2k.js b/copyparty/web/up2k.js
index 34ca9a3a..7e40d5f3 100644
--- a/copyparty/web/up2k.js
+++ b/copyparty/web/up2k.js
@@ -1179,7 +1179,7 @@ function up2k_init(subtle) {
 
         var msg = [];
 
-        if (FIREFOX && good_files.length > 5000)
+        if (FIREFOX && good_files.length > 3000)
             msg.push(L.u_ff_many);
 
         msg.push(L.u_asku.format(good_files.length, esc(get_vpath())) + '<ul>');
@@ -1948,7 +1948,10 @@ function up2k_init(subtle) {
 
         var xhr = new XMLHttpRequest();
         xhr.onerror = function () {
-            console.log('head onerror, retrying', t);
+            console.log('head onerror, retrying', t.name, t);
+            if (!toast.visible)
+                toast.warn(9.98, L.u_enethd + "\n\nfile: " + t.name, t);
+
             apop(st.busy.head, t);
             st.todo.head.unshift(t);
         };
@@ -2004,22 +2007,25 @@ function up2k_init(subtle) {
         t.t_busied = me;
 
         if (keepalive)
-            console.log("sending keepalive handshake", t);
+            console.log("sending keepalive handshake", t.name, t);
 
         var xhr = new XMLHttpRequest();
         xhr.onerror = function () {
             if (t.t_busied != me) {
-                console.log('zombie handshake onerror,', t);
+                console.log('zombie handshake onerror,', t.name, t);
                 return;
             }
-            console.log('handshake onerror, retrying', t);
+            if (!toast.visible)
+                toast.warn(9.98, L.u_eneths + "\n\nfile: " + t.name, t);
+
+            console.log('handshake onerror, retrying', t.name, t);
             apop(st.busy.handshake, t);
             st.todo.handshake.unshift(t);
             t.keepalive = keepalive;
         };
         function orz(e) {
             if (t.t_busied != me) {
-                console.log('zombie handshake onload,', t);
+                console.log('zombie handshake onload,', t.name, t);
                 return;
             }
             if (xhr.status == 200) {
@@ -2286,7 +2292,7 @@ function up2k_init(subtle) {
             }
             else if (txt.indexOf('already got that') + 1 ||
                 txt.indexOf('already being written') + 1) {
-                console.log("ignoring dupe-segment error", t);
+                console.log("ignoring dupe-segment error", t.name, t);
             }
             else {
                 xhrchk(xhr, L.u_cuerr2.format(npart, Math.ceil(t.size / chunksize), t.name), "404, target folder not found (???)", "warn", t);
@@ -2323,7 +2329,7 @@ function up2k_init(subtle) {
                 if (!toast.visible)
                     toast.warn(9.98, L.u_cuerr.format(npart, Math.ceil(t.size / chunksize), t.name), t);
 
-                console.log('chunkpit onerror,', ++tries, t);
+                console.log('chunkpit onerror,', ++tries, t.name, t);
                 orz2(xhr);
             };
             xhr.open('POST', t.purl, true);
diff --git a/copyparty/web/w.hash.js b/copyparty/web/w.hash.js
index ff851d18..ae71482e 100644
--- a/copyparty/web/w.hash.js
+++ b/copyparty/web/w.hash.js
@@ -51,6 +51,7 @@ onmessage = (d) => {
             hash_calc(gc1);
         }
         catch (ex) {
+            busy = false;
             postMessage(["panic", ex + '']);
         }
     };