diff --git a/nuxeo-platform-webapp/src/main/resources/nuxeo.war/incl/includes.xhtml b/nuxeo-platform-webapp/src/main/resources/nuxeo.war/incl/includes.xhtml
--- a/nuxeo-platform-webapp/src/main/resources/nuxeo.war/incl/includes.xhtml
+++ b/nuxeo-platform-webapp/src/main/resources/nuxeo.war/incl/includes.xhtml
@@ -167,7 +167,7 @@ function transfertCanceled()
     if ( typeof(ECMPluginCancelCallBack)=="function" )
       ECMPluginCancelCallBack(result);
     else if ( typeof(ECMPluginCancelCallBack)=="string" )
-      eval( ECMPluginCancelCallBack + "('" + result + "')");
+      eval( ECMPluginCancelCallBack + "(\"" + result + "\")");
 
     }
 }
@@ -244,7 +244,7 @@ function FileAddedCallback(result)
       if ( typeof(ECMPluginCallBack)=="function" )
         ECMPluginCallBack(result);
       else if ( typeof(ECMPluginCallBack)=="string" )
-        eval( ECMPluginCallBack + "('" + result + "')");
+        eval( ECMPluginCallBack + "(\"" + result + "\")");
 
     }
   } else{
@@ -265,7 +265,7 @@ function FolderAddedCallback(result)
       if ( typeof(ECMPluginCallBack)=="function" )
         ECMPluginCallBack(result);
       else if ( typeof(ECMPluginCallBack)=="string" )
-        eval( ECMPluginCallBack + "('" + result + "')");
+        eval( ECMPluginCallBack + "(\"" + result + "\")");
     }
   } else{
     alert("undefined result in FolderAddedCallback")
@@ -283,7 +283,7 @@ function CanWriteCallback(result)
       if ( typeof(ECMPluginCallBack)=="function" )
         ECMPluginCallBack(result);
       else if ( typeof(ECMPluginCallBack)=="string" )
-        eval( ECMPluginCallBack + "('" + result + "')");
+        eval( ECMPluginCallBack + "(\"" + result + "\")");
     }
   } else{
     alert("undefined result in CanWriteCallback")
@@ -302,7 +302,7 @@ function LogInBrowser(text)
     eval( 'external.LogText(' + text + ')' );
   }
   catch(e)
-  {}
+  { alert(e);}
 }
 
 if (window.addEventListener)