=== modified file 'softwarecenter/ui/gtk3/app.py'
--- a/softwarecenter/ui/gtk3/app.py	2013-07-24 15:01:22 +0000
+++ b/softwarecenter/ui/gtk3/app.py	2014-04-17 13:40:15 +0000
@@ -998,6 +998,9 @@
             self.active_pane.app_details_view.desc.copy_clipboard()
 
     def on_menuitem_paste_activate(self, menuitem):
+        # LP: #1308354
+        if self.active_pane.searchentry.get_property("visible") == False:
+            return
         self.active_pane.searchentry.paste_clipboard()
 
     def on_menuitem_delete_activate(self, menuitem):