rem: bucketTree.selectItem(bucketList.firstChild); 
add: bucketList.selectItem(bucketList.firstChild); 
context: function FocusOnFirstAttachment(){  var bucketList = document.getElementById("attachmentBucket");  if (bucketList && bucketList.hasChildNodes())    bucketTree.selectItem(bucketList.firstChild);}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/07deeae1a09888ea43964a42a96e6de344b0b59a/MsgComposeCommands.js/buggy/mailnews/compose/resources/content/MsgComposeCommands.js