diff --git a/management/univention-appcenter/umc/js/appcenter/AppDetailsPage.js b/management/univention-appcenter/umc/js/appcenter/AppDetailsPage.js
index 9cda3b4..cae357d 100644
--- a/management/univention-appcenter/umc/js/appcenter/AppDetailsPage.js
+++ b/management/univention-appcenter/umc/js/appcenter/AppDetailsPage.js
@@ -957,7 +957,7 @@ define([
 					'values': values || {}
 				};
 
-				this._progressBar.reset(_('%s: Performing software tests on involved systems', entities.encode(this.app.name)));
+				this._progressBar.reset(_('%s: Performing software tests on involved systems', this.app.name));
 				this._progressBar._progressBar.set('value', Infinity); // TODO: Remove when this is done automatically by .reset()
 				var invokation;
 				if (this.app.installsAsDocker()) {
@@ -1082,7 +1082,7 @@ define([
 			if (keepAlive !== false) {
 				tools.umcpCommand('appcenter/keep_alive', {}, false);
 			}
-			msg = entities.encode(msg || _('Another package operation is in progress.'));
+			msg = msg || _('Another package operation is in progress.');
 			var callback = lang.hitch(this, function() {
 				if (this._progressBar.getErrors().errors.length) {
 					deferred.reject();
@@ -1110,14 +1110,17 @@ define([
 					var role = match[2];
 					var host = match[3];
 					error = '<p>' + _('Installing the extension of the LDAP schema on %s seems to have failed.', '<strong>' + entities.encode(host) + '</strong>') + '</p>';
-					if (role == 'DC Backup') {
+					if (role === 'DC Backup') {
 						error += '<p>' + _('If everything else went correct and this is just a temporary network problem, you should execute %s as root on that backup system.', '<pre>univention-add-app ' + entities.encode(component) + ' -m</pre>') + '</p>';
 					}
 					error += '<p>' + _('Further information can be found in the following log file on each of the involved systems: %s', '<br /><em>/var/log/univention/management-console-module-appcenter.log</em>') + '</p>';
+				} else {
+					error = entities.encode(error);
 				}
 				return error;
 			});
 			this._progressBar._errors = errors;
+			this._progressBar.allowHTMLErrors = true;
 			this._progressBar.stop(lang.hitch(this, 'restartOrReload'), undefined, true);
 		},
 
diff --git a/management/univention-appcenter/umc/js/appcenter/PackagesPage.js b/management/univention-appcenter/umc/js/appcenter/PackagesPage.js
index ace2898..879715d 100644
--- a/management/univention-appcenter/umc/js/appcenter/PackagesPage.js
+++ b/management/univention-appcenter/umc/js/appcenter/PackagesPage.js
@@ -418,8 +418,8 @@ define([
 						}
 					];
 				} else {
-					headline = _("Do you really want to %(verb)s %(ids)s?", {verb: verb, ids: array.map(ids, lang.hitch(entities, 'encode')).join(', ')});
-					var msg = _("%(verb)s %(ids)s", {verb: verb1, ids: array.map(ids, lang.hitch(entities, 'encode')).join(', ')});
+					headline = _("Do you really want to %(verb)s %(ids)s?", {verb: verb, ids: ids.join(', ')});
+					var msg = _("%(verb)s %(ids)s", {verb: verb1, ids: ids.join(', ')});
 					buttons = [
 						{
 							name: 'cancel',
diff --git a/management/univention-web/js/widgets/ProgressBar.js b/management/univention-web/js/widgets/ProgressBar.js
index 656cedd..af908c9 100644
--- a/management/univention-web/js/widgets/ProgressBar.js
+++ b/management/univention-web/js/widgets/ProgressBar.js
@@ -46,6 +46,8 @@ define([
 		//		This class provides a widget providing detailed progress information
 		baseClass: 'umcProgressBar',
 
+		allowHTMLErrors: false,
+
 		_component: null,
 		_message: null,
 		_progressBar: null,
@@ -86,7 +88,7 @@ define([
 			this._criticalError = false;
 			this._errors = [];
 
-			this._component.set('content', this._initialComponent);
+			this._component.set('content', entities.encode(this._initialComponent));
 
 			// make sure that at least a not breakable space is printed
 			// ... this avoids vertical jumping of widgets
@@ -172,10 +174,10 @@ define([
 			if (errors.length && handleErrors) {
 				var msg = '';
 				if (errors.length === 1) {
-					msg = _('An error occurred: ') + errors[0];
+					msg = _('An error occurred: ') + this._encodeError(errors[0]);
 				} else {
 					msg = lang.replace(_('{number} errors occurred: '), {number : errors.length});
-					msg += '<ul><li>' + errors.join('</li><li>') + '</li></ul>';
+					msg += '<ul><li>' + array.map(errors, lang.hitch(this, '_encodeError')).join('</li><li>') + '</li></ul>';
 				}
 				dialog.confirm(msg, [{
 					label: 'Ok',
@@ -187,6 +189,13 @@ define([
 			}
 		},
 
+		_encodeError: function(error) {
+			if (!this.allowHTMLErrors) {
+				error = entities.encode(error);
+			}
+			return error;
+		},
+
 		getErrors: function() {
 			return {'errors' : this._errors, 'critical' : this._criticalError};
 		}