diff --git a/apps/files/css/files.css b/apps/files/css/files.css
index 94eafe2752099..5f026d7edd4db 100644
--- a/apps/files/css/files.css
+++ b/apps/files/css/files.css
@@ -293,6 +293,7 @@ table td.filename .thumbnail {
 	float: left;
 	position: absolute;
 	z-index: 4;
+	border: 1px solid #f7f7f7;
 }
 table td.filename input.filename {
 	width: 70%;
diff --git a/core/css/header.css b/core/css/header.css
index f80db22f0cdc2..4d17f16d3dd8e 100644
--- a/core/css/header.css
+++ b/core/css/header.css
@@ -152,9 +152,6 @@
 	padding-bottom: 10px;
 	background-color: rgba(0, 0, 0, .97);
 	box-shadow: 0 1px 10px rgba(50, 50, 50, .7);
-	border-radius: 3px;
-	border-top-left-radius: 0;
-	border-top-right-radius: 0;
 	display: none;
 	/*overflow-y: auto;
 	overflow-x: hidden;*/
@@ -333,9 +330,6 @@
 	background: rgb(255, 255, 255);
 	border: 1px solid rgb(204, 204, 204);
 	box-shadow: 0 1px 10px rgba(50, 50, 50, .7);
-	border-radius: 3px;
-	border-top-left-radius: 0;
-	border-top-right-radius: 0;
 	box-sizing: border-box;
 }
 #expanddiv:after {
diff --git a/core/css/jquery-ui-fixes.css b/core/css/jquery-ui-fixes.css
index 462f450c74ceb..9e251bc13e409 100644
--- a/core/css/jquery-ui-fixes.css
+++ b/core/css/jquery-ui-fixes.css
@@ -17,8 +17,8 @@
 }
 .ui-widget-header {
 	border: 1px solid #0082c9;
-	background: #0082c9 url('images/ui-bg_flat_35_1d2d44_40x100.png') 50% 50% repeat-x;
-	color: #ffffff;
+	background: #0082c9;
+	color: #fff;
 }
 .ui-widget-header a {
 	color: #ffffff;
diff --git a/core/css/styles.css b/core/css/styles.css
index 451a86a5c4792..48e99cbeb935e 100644
--- a/core/css/styles.css
+++ b/core/css/styles.css
@@ -660,7 +660,7 @@ td.avatar {
 	margin: 0 auto;
 	max-width: 60%;
 	z-index: 8000;
-	background-color: #fc4;
+	background-color: #FFF;
 	border: 0;
 	padding: 1px 8px;
 	display: none;
@@ -689,6 +689,7 @@ td.avatar {
 	position: absolute;
 	right: 0;
 	top: 0;
+	margin-top: 2px;
 }
 #notification .row.closeable {
 	padding-right: 20px;