diff -r b833d7c72ea9 -r 5869151a1f2f web/res/js/live-polemic.js
--- a/web/res/js/live-polemic.js	Wed Dec 11 11:04:27 2019 +0100
+++ b/web/res/js/live-polemic.js	Wed Dec 11 14:30:18 2019 +0100
@@ -482,7 +482,7 @@
         html += ' style="display: none"';
     }
     html += '>';
-    if (tweet.annotations.length) {
+    if (tweet.annotations && tweet.annotations.length) {
         html += '<div class="annotations">';
         for (var i in tweet.annotations) {
             html += '<div class="annotation" style="width:' + (100/tweet.annotations.length) + '%; background:' + getColor(tweet.annotations[i], (className == 'icons' ? .4 : .85)).hex + '"></div>';
@@ -507,10 +507,10 @@
         txt += highlight( tweet.full_text.substring(lastend) );
         html += '<p class="tweet_text"><b>' + a_user + highlight('@' + tweet.user.screen_name) + '</a>' + ( className == 'full' ? ' (' + tweet.user.name + ')</b><br />' : '</b> : ') + txt + '</p>';
         if (className == 'full' && el == 'li') {
-            html += '<div class="tweet_actions"><a href="http://twitter.com/' + tweet.user.screen_name + '/status/' + tweet.id + '" onclick="tweetPopup(this.href); return false;" target="_blank">afficher tweet</a> - ';
-            html += '<a href="http://twitter.com/intent/tweet?in_reply_to=' + tweet.id + '" onclick="tweetPopup(this.href); return false;" target="_blank">répondre</a> · ';
-            html += '<a href="http://twitter.com/intent/retweet?tweet_id=' + tweet.id + '" onclick="tweetPopup(this.href); return false;" target="_blank">retweeter</a> · ';
-            html += '<a href="http://twitter.com/intent/favorite?tweet_id=' + tweet.id + '" onclick="tweetPopup(this.href); return false;" target="_blank">favori</a></div>';
+            html += '<div class="tweet_actions"><a href="https://twitter.com/' + tweet.user.screen_name + '/status/' + tweet.id + '" onclick="tweetPopup(this.href); return false;" target="_blank">afficher tweet</a> - ';
+            html += '<a href="https://twitter.com/intent/tweet?in_reply_to=' + tweet.id + '" onclick="tweetPopup(this.href); return false;" target="_blank">répondre</a> · ';
+            html += '<a href="https://twitter.com/intent/retweet?tweet_id=' + tweet.id + '" onclick="tweetPopup(this.href); return false;" target="_blank">retweeter</a> · ';
+            html += '<a href="https://twitter.com/intent/favorite?tweet_id=' + tweet.id + '" onclick="tweetPopup(this.href); return false;" target="_blank">favori</a></div>';
         }
     }
     html += '</div></' + el + '>';
@@ -550,7 +550,7 @@
     var x,
         y,
         dt = tweet.date_value,
-        ann = ( annotation ? annotation : ( tweet.annotations.length ? tweet.annotations[0] : 'default' ) );
+        ann = ( annotation ? annotation : ( tweet.annotations && tweet.annotations.length ? tweet.annotations[0] : 'default' ) );
     for (var i = 0; i < twCx.tlOnDisplay.length; i++) {
         if (twCx.tlOnDisplay[i].end > dt) {
             y = twCx.tlHeight - (i + .5) * twCx.scaleY;
@@ -857,7 +857,7 @@
             var tweetid = twCx.tlOnDisplay[i].tweets[j],
                 tweet = tweetById(tweetid);
             if (tweet) {
-                if (tweet.annotations.length) {
+                if (tweet.annotations && tweet.annotations.length) {
                     for (var k in tweet.annotations) {
                         displayData[tweet.annotations[k]].push(tweetid);
                     }