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: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/42dcdfe62c4d4dba060af48742e3823b482b76e6/MsgComposeCommands.js/clean/mailnews/compose/resources/content/MsgComposeCommands.js