rem: if (attachmentBox.hidden) { attachmentBox.hidden = false; document.getElementById("attachmentbucket-sizer").hidden=false; } 
add: if (attachmentBox.collapsed) ChangeAttachmentBucketVisibility(false); 
context:   onDragOver: function (aEvent, aFlavour, aDragSession)    {      if (aFlavour.contentType != "text/x-moz-address")      {        // make sure the attachment box is visible during drag over        var attachmentBox = document.getElementById("attachments-box");        if (attachmentBox.hidden)        {          attachmentBox.hidden = false;          document.getElementById("attachmentbucket-sizer").hidden=false;        }      }      else      {          DragAddressOverTargetControl(aEvent);      }    },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/e4fe9f4c016d51928b00ca063046836dc4caea5d/MsgComposeCommands.js/clean/mail/components/compose/content/MsgComposeCommands.js