add:  if (event.originalTarget.localName == "treecol") return;  
context: function DirPaneDoubleClick(){  if (dirTree && dirTree.treeBoxObject.selection && dirTree.treeBoxObject.selection.count == 1)    AbEditSelectedDirectory();}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/fd26233979f82786ad999cbf7f9f49086268b9e7/abCommon.js/clean/mailnews/addrbook/resources/content/abCommon.js