diff --git a/lib/installer.php b/lib/installer.php
index 101c99e9c1f2f7463dafb36e98f41f9a13a7e7f2..c9d331551c0d0bdbb7b26d7de639a2ac5313eecc 100644
--- a/lib/installer.php
+++ b/lib/installer.php
@@ -141,7 +141,7 @@ class OC_Installer{
 		// check if shipped tag is set which is only allowed for apps that are shipped with ownCloud
 		if(isset($info['shipped']) and ($info['shipped']=='true')) {
 			OC_Helper::rmdirr($extractDir);
-			throw new \Exception($l->t("App can't be installed because it contains the <shipped>true</shipped> tag which is not allowed for non shipped apps"));
+			throw new \Exception($l->t("App can't be installed because it contains the <shipped>true</shipped> tag which is not allowed for non shipped apps"));
 		}
 
 		// check if the ocs version is the same as the version in info.xml/version
diff --git a/settings/css/settings.css b/settings/css/settings.css
index 20df5d86d65100a581a4b462e918f61cfb927d09..38c28dd33b977324fd0e89f900da41e48a3e5b58 100644
--- a/settings/css/settings.css
+++ b/settings/css/settings.css
@@ -61,7 +61,7 @@ select.quota.active { background: #fff; }
 .ie8 table.hascontrols tbody tr{border-collapse:collapse;border: 1px solid #ddd !important;}
 
 /* APPS */
-.appinfo { margin: 1em; }
+.appinfo { margin: 1em 40px; }
 h3 { font-size: 1.4em; font-weight: bold; }
 ul.applist a {
 	height: 2.2em;
@@ -72,6 +72,12 @@ ul.applist .app-external {
 }
 li { color:#888; }
 li.active { color:#000; }
+#leftcontent .appwarning {
+	background: #fcc;
+}
+#leftcontent .appwarning:hover {
+	background: #fbb;
+}
 small.externalapp { color:#FFF; background-color:#BBB; font-weight:bold; font-size: 0.6em; margin: 0; padding: 0.1em 0.2em; border-radius: 4px;}
 small.externalapp.list { float: right; }
 small.recommendedapp { color:#FFF; background-color:#888; font-weight:bold; font-size: 0.6em; margin: 0; padding: 0.1em 0.2em; border-radius: 4px;}
@@ -86,6 +92,14 @@ span.version { margin-left:1em; margin-right:1em; color:#555; }
 
 .appslink { text-decoration: underline; }
 .score { color:#666; font-weight:bold; font-size:0.8em; }
+.errormsg {
+	margin: 20px;
+	padding: 5px;
+	background: #fdd;
+	-webkit-border-radius: 3px;
+	-moz-border-radius: 3px;
+	border-radius: 3px;
+}
 
 /* LOG */
 #log { white-space:normal; }
diff --git a/settings/js/apps.js b/settings/js/apps.js
index 6c835a5999703256dfb6b0e4f566cc6762ef7b9e..e49fd21a597cdd8d3ea6d831d6126200c09db7a3 100644
--- a/settings/js/apps.js
+++ b/settings/js/apps.js
@@ -27,7 +27,7 @@ OC.Settings.Apps = OC.Settings.Apps || {
 		}
 		page.find('small.externalapp').attr('style', 'visibility:visible');
 		page.find('span.author').text(app.author);
-		page.find('span.licence').text(app.licence);
+		page.find('span.licence').text(app.license);
 
 		if (app.update !== false) {
 			page.find('input.update').show();
@@ -50,6 +50,12 @@ OC.Settings.Apps = OC.Settings.Apps || {
 			page.find('p.appslink').hide();
 			page.find('span.score').hide();
 		}
+		if (typeof($('#leftcontent li[data-id="'+app.id+'"]').data('errormsg')) !== "undefined") {
+			page.find(".errormsg").show();
+			page.find(".errormsg").text($('#leftcontent li[data-id="'+app.id+'"]').data('errormsg'));
+		} else {
+			page.find(".errormsg").hide();
+		}
 	},
 	enableApp:function(appid, active, element) {
 		console.log('enableApp:', appid, active, element);
@@ -62,40 +68,48 @@ OC.Settings.Apps = OC.Settings.Apps || {
 			$.post(OC.filePath('settings','ajax','disableapp.php'),{appid:appid},function(result) {
 				if(!result || result.status !== 'success') {
 					if (result.data && result.data.message) {
-						OC.dialogs.alert(result.data.message, t('core', 'Error'));
+						OC.Settings.Apps.showErrorMessage(result.data.message);
+						$('#leftcontent li[data-id="'+appid+'"]').data('errormsg', result.data.message);
 					} else {
-						OC.dialogs.alert(t('settings', 'Error while disabling app'), t('core', 'Error'));
+						OC.Settings.Apps.showErrorMessage(t('settings', 'Error while disabling app'));
+						$('#leftcontent li[data-id="'+appid+'"]').data('errormsg', t('settings', 'Error while disabling app'));
 					}
+					element.val(t('settings','Disable'));
+					$('#leftcontent li[data-id="'+appid+'"]').addClass('appwarning');
 				}
 				else {
 					element.data('active',false);
 					OC.Settings.Apps.removeNavigation(appid);
+					$('#leftcontent li[data-id="'+appid+'"]').removeClass('active');
 					element.val(t('settings','Enable'));
 				}
 			},'json');
-			$('#leftcontent li[data-id="'+appid+'"]').removeClass('active');
 		} else {
 			$.post(OC.filePath('settings','ajax','enableapp.php'),{appid:appid},function(result) {
 				if(!result || result.status !== 'success') {
 					if (result.data && result.data.message) {
-						OC.dialogs.alert(result.data.message, t('core', 'Error'));
+						OC.Settings.Apps.showErrorMessage(result.data.message);
+						$('#leftcontent li[data-id="'+appid+'"]').data('errormsg', result.data.message);
 					} else {
-						OC.dialogs.alert(t('settings', 'Error while enabling app'), t('core', 'Error'));
+						OC.Settings.Apps.showErrorMessage(t('settings', 'Error while enabling app'));
+						$('#leftcontent li[data-id="'+appid+'"]').data('errormsg', t('settings', 'Error while disabling app'));
 					}
 					element.val(t('settings','Enable'));
+					$('#leftcontent li[data-id="'+appid+'"]').addClass('appwarning');
 				} else {
 					OC.Settings.Apps.addNavigation(appid);
 					element.data('active',true);
+					$('#leftcontent li[data-id="'+appid+'"]').addClass('active');
 					element.val(t('settings','Disable'));
 				}
 			},'json')
 			.fail(function() { 
-				OC.dialogs.alert(t('settings', 'Error while enabling app'), t('core', 'Error'));
+				OC.Settings.Apps.showErrorMessage(t('settings', 'Error while enabling app'));
+				$('#leftcontent li[data-id="'+appid+'"]').data('errormsg', t('settings', 'Error while enabling app'));
 				element.data('active',false);
 				OC.Settings.Apps.removeNavigation(appid);
 				element.val(t('settings','Enable'));
 			});
-			$('#leftcontent li[data-id="'+appid+'"]').addClass('active');
 		}
 	},
 	updateApp:function(appid, element) {
@@ -103,7 +117,8 @@ OC.Settings.Apps = OC.Settings.Apps || {
 		element.val(t('settings','Updating....'));
 		$.post(OC.filePath('settings','ajax','updateapp.php'),{appid:appid},function(result) {
 			if(!result || result.status !== 'success') {
-				OC.dialogs.alert(t('settings','Error while updating app'),t('settings','Error'));
+				OC.Settings.Apps.showErrorMessage(t('settings','Error while updating app'),t('settings','Error'));
+				element.val(t('settings','Update'));
 			}
 			else {
 				element.val(t('settings','Updated'));
@@ -175,6 +190,10 @@ OC.Settings.Apps = OC.Settings.Apps || {
 				}
 			}
 		});
+	},
+	showErrorMessage: function(message) {
+		$('#rightcontent .errormsg').show();
+		$('#rightcontent .errormsg').text(message);
 	}
 };
 
diff --git a/settings/templates/apps.php b/settings/templates/apps.php
index d60fd82f9175f94b815bb57407cffc0f05787ad3..b6b731ac9c5ceec1aa7285c962e982ec1659629e 100644
--- a/settings/templates/apps.php
+++ b/settings/templates/apps.php
@@ -41,5 +41,6 @@
 		print_unescaped($l->t('<span class="licence"></span>-licensed by <span class="author"></span>'));?></p>
 	<input class="enable hidden" type="submit" />
 	<input class="update hidden" type="submit" value="<?php p($l->t('Update')); ?>" />
+	<div class="errormsg hidden"></div>
 	</div>
 </div>