diff --git a/part/arkviewer.cpp b/part/arkviewer.cpp
--- a/part/arkviewer.cpp
+++ b/part/arkviewer.cpp
@@ -172,7 +172,7 @@
     setWindowFilePath(fileName);
 
     // Set icon and comment for the mimetype.
-    m_iconLabel->setPixmap(QIcon::fromTheme(mimeType.iconName()).pixmap(IconSize(KIconLoader::Desktop), IconSize(KIconLoader::Desktop)));
+    m_iconLabel->setPixmap(QIcon::fromTheme(mimeType.iconName()).pixmap(IconSize(KIconLoader::Small), IconSize(KIconLoader::Small)));
     m_commentLabel->setText(mimeType.comment());
 
     // Create the ReadOnlyPart instance.
diff --git a/part/arkviewer.ui b/part/arkviewer.ui
--- a/part/arkviewer.ui
+++ b/part/arkviewer.ui
@@ -15,6 +15,24 @@
   </property>
   <widget class="QWidget" name="centralwidget">
    <layout class="QVBoxLayout" name="verticalLayout">
+    <property name="spacing">
+     <number>0</number>
+    </property>
+    <property name="leftMargin">
+     <number>0</number>
+    </property>
+    <property name="topMargin">
+     <number>0</number>
+    </property>
+    <property name="rightMargin">
+     <number>0</number>
+    </property>
+    <property name="bottomMargin">
+     <number>0</number>
+    </property>
+    <item>
+     <widget class="QWidget" name="m_partPlaceholder" native="true"/>
+    </item>
     <item>
      <widget class="QWidget" name="m_mimeWidget" native="true">
       <property name="sizePolicy">
@@ -24,6 +42,12 @@
        </sizepolicy>
       </property>
       <layout class="QHBoxLayout" name="horizontalLayout">
+       <property name="topMargin">
+        <number>0</number>
+       </property>
+       <property name="bottomMargin">
+        <number>0</number>
+       </property>
        <item>
         <widget class="QLabel" name="m_iconLabel">
          <property name="text">
@@ -51,22 +75,19 @@
          </property>
         </spacer>
        </item>
+       <item>
+        <widget class="QDialogButtonBox" name="m_buttonBox">
+         <property name="orientation">
+          <enum>Qt::Horizontal</enum>
+         </property>
+         <property name="standardButtons">
+          <set>QDialogButtonBox::Close</set>
+         </property>
+        </widget>
+       </item>
       </layout>
      </widget>
     </item>
-    <item>
-     <widget class="QWidget" name="m_partPlaceholder" native="true"/>
-    </item>
-    <item>
-     <widget class="QDialogButtonBox" name="m_buttonBox">
-      <property name="orientation">
-       <enum>Qt::Horizontal</enum>
-      </property>
-      <property name="standardButtons">
-       <set>QDialogButtonBox::Close</set>
-      </property>
-     </widget>
-    </item>
    </layout>
   </widget>
  </widget>