rem: if (event.target.localName != 'treecell') 
add: if (event.originalTarget.localName == 'treechildren') 
context: function AttachmentBucketClicked(event){  if (event.target.localName != 'treecell')    goDoCommand('cmd_attachFile');}  
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/abf8756c0ef3ef501aa87ff65509f8718f22596b/MsgComposeCommands.js/clean/mailnews/compose/resources/content/MsgComposeCommands.js