diff --git a/src/calibre/gui2/dialogs/metadata_bulk.py b/src/calibre/gui2/dialogs/metadata_bulk.py
index dc691c4ffe..bde5cae128 100644
--- a/src/calibre/gui2/dialogs/metadata_bulk.py
+++ b/src/calibre/gui2/dialogs/metadata_bulk.py
@@ -414,6 +414,9 @@ class MetadataBulkDialog(QDialog, Ui_MetadataBulkDialog):
         self.s_r_template.completer().setCaseSensitivity(Qt.CaseSensitive)
 
         self.s_r_search_mode_changed(self.search_mode.currentIndex())
+        self.multiple_separator.setFixedWidth(30)
+        self.multiple_separator.setText(' ::: ')
+        self.multiple_separator.textChanged.connect(self.s_r_separator_changed)
 
     def s_r_get_field(self, mi, field):
         if field:
@@ -451,19 +454,22 @@ class MetadataBulkDialog(QDialog, Ui_MetadataBulkDialog):
             mi = self.db.get_metadata(self.ids[i], index_is_id=True)
             src = unicode(self.search_field.currentText())
             t = self.s_r_get_field(mi, src)
-            w.setText(''.join(t[0:1]))
+            w.setText(unicode(self.multiple_separator.text()).join(t))
 
         if self.search_mode.currentIndex() == 0:
             self.destination_field.setCurrentIndex(idx)
         else:
+            self.s_r_destination_field_changed(self.destination_field.currentText())
             self.s_r_paint_results(None)
 
     def s_r_destination_field_changed(self, txt):
         txt = unicode(txt)
+        if not txt:
+            txt = unicode(self.search_field.currentText())
         self.comma_separated.setEnabled(True)
-        if txt:
-            fm = self.db.metadata_for_field(txt)
-            if fm['is_multiple']:
+        if txt and txt in self.writable_fields:
+            self.destination_field_fm = self.db.metadata_for_field(txt)
+            if self.destination_field_fm['is_multiple']:
                 self.comma_separated.setEnabled(False)
                 self.comma_separated.setChecked(True)
         self.s_r_paint_results(None)
@@ -493,6 +499,9 @@ class MetadataBulkDialog(QDialog, Ui_MetadataBulkDialog):
             self.s_r_heading.setText('<p>'+self.main_heading + self.regexp_heading)
         self.s_r_paint_results(None)
 
+    def s_r_separator_changed(self, txt):
+        self.s_r_search_field_changed(self.search_field.currentIndex())
+
     def s_r_set_colors(self):
         if self.s_r_error is not None:
             col = 'rgb(255, 0, 0, 20%)'
@@ -592,8 +601,12 @@ class MetadataBulkDialog(QDialog, Ui_MetadataBulkDialog):
             wr = getattr(self, 'book_%d_result'%(i+1))
             try:
                 result = self.s_r_do_regexp(mi)
-                t = self.s_r_do_destination(mi, result[0:1])
-                t = self.s_r_replace_mode_separator().join(t)
+                t = self.s_r_do_destination(mi, result)
+                if len(result) > 1 and self.destination_field_fm is not None and \
+                            self.destination_field_fm['is_multiple']:
+                    t = unicode(self.multiple_separator.text()).join(t)
+                else:
+                    t = self.s_r_replace_mode_separator().join(t)
                 wr.setText(t)
             except Exception as e:
                 self.s_r_error = e
diff --git a/src/calibre/gui2/dialogs/metadata_bulk.ui b/src/calibre/gui2/dialogs/metadata_bulk.ui
index dca7abc82c..d945909f96 100644
--- a/src/calibre/gui2/dialogs/metadata_bulk.ui
+++ b/src/calibre/gui2/dialogs/metadata_bulk.ui
@@ -478,7 +478,7 @@ Future conversion of these books will use the default settings.</string>
            <item>
             <widget class="QLabel" name="xlabel_24">
              <property name="text">
-              <string>Search mode:</string>
+              <string>Search &amp;mode:</string>
              </property>
              <property name="buddy">
               <cstring>search_mode</cstring>
@@ -559,7 +559,7 @@ Future conversion of these books will use the default settings.</string>
             <string>Check this box if the search string must match exactly upper and lower case. Uncheck it if case is to be ignored</string>
            </property>
            <property name="text">
-            <string>Case sensitive</string>
+            <string>Cas&amp;e sensitive</string>
            </property>
            <property name="checked">
             <bool>true</bool>
@@ -588,7 +588,7 @@ Future conversion of these books will use the default settings.</string>
            <item>
             <widget class="QLabel" name="label_41">
              <property name="text">
-              <string>Apply function after replace:</string>
+              <string>&amp;Apply function after replace:</string>
              </property>
              <property name="buddy">
               <cstring>replace_func</cstring>
@@ -641,7 +641,7 @@ If blank, the source field is used if the field is modifiable</string>
            <item>
             <widget class="QLabel" name="replace_mode_label">
              <property name="text">
-              <string>Mode:</string>
+              <string>M&amp;ode:</string>
              </property>
              <property name="buddy">
               <cstring>replace_mode</cstring>
@@ -658,11 +658,11 @@ If blank, the source field is used if the field is modifiable</string>
            <item>
             <widget class="QCheckBox" name="comma_separated">
              <property name="toolTip">
-              <string>If the replace mode is prepend or append, then this box indicates whether a comma or
-nothing should be put between the original text and the inserted text</string>
+              <string>Specifies whether a comma should be put between values when copying from a
+multiple-valued field to a single-valued field</string>
              </property>
              <property name="text">
-              <string>use comma</string>
+              <string>&amp;Use comma</string>
              </property>
              <property name="checked">
               <bool>true</bool>
@@ -687,7 +687,7 @@ nothing should be put between the original text and the inserted text</string>
          <item row="8" column="1">
           <widget class="QLabel" name="xlabel_3">
            <property name="text">
-            <string>Test &amp;text</string>
+            <string>Test text</string>
            </property>
            <property name="buddy">
             <cstring>test_text</cstring>
@@ -695,14 +695,48 @@ nothing should be put between the original text and the inserted text</string>
           </widget>
          </item>
          <item row="8" column="2">
-          <widget class="QLabel" name="label_51">
-           <property name="text">
-            <string>Test re&amp;sult</string>
-           </property>
-           <property name="buddy">
-            <cstring>test_result</cstring>
-           </property>
-          </widget>
+          <layout class="QHBoxLayout" name="horizontalLayout_21">
+           <item>
+            <widget class="QLabel" name="label_51">
+             <property name="text">
+              <string>Test result</string>
+             </property>
+             <property name="buddy">
+              <cstring>test_result</cstring>
+             </property>
+            </widget>
+           </item>
+           <item>
+            <spacer name="HSpacer_347">
+             <property name="orientation">
+              <enum>Qt::Horizontal</enum>
+             </property>
+             <property name="sizeHint" stdset="0">
+              <size>
+               <width>20</width>
+               <height>0</height>
+              </size>
+             </property>
+            </spacer>
+           </item>
+           <item>
+            <widget class="QLabel" name="xlabel_41">
+             <property name="text">
+              <string>Multi&amp;ple separator:</string>
+             </property>
+             <property name="buddy">
+              <cstring>multiple_separator</cstring>
+             </property>
+            </widget>
+           </item>
+           <item>
+            <widget class="QLineEdit" name="multiple_separator">
+             <property name="toolTip">
+              <string>Used when displaying test results to separate values in multiple-valued fields</string>
+             </property>
+            </widget>
+           </item>
+          </layout>
          </item>
          <item row="9" column="0" colspan="4">
           <widget class="QScrollArea" name="scrollArea11">
@@ -823,7 +857,7 @@ nothing should be put between the original text and the inserted text</string>
   <tabstop>destination_field</tabstop>
   <tabstop>replace_mode</tabstop>
   <tabstop>comma_separated</tabstop>
-  <tabstop>scrollArea11</tabstop>
+  <tabstop>multiple_separator</tabstop>
   <tabstop>test_text</tabstop>
   <tabstop>test_result</tabstop>
  </tabstops>