rem: event.preventBubble(); 
add: event.stopPropagation(); 
context: function DirPaneClick(event){  // we only care about left button events  if (event.button != 0)    return;  // if the user clicks on the header / trecol, do nothing  if (event.originalTarget.localName == "treecol") {    event.preventBubble();    return;  }}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/04cfde2d6fd8dbf1abe2b7ec6ca8d6cbb0386d6d/abCommon.js/buggy/mail/components/addrbook/content/abCommon.js