--- bbs2chreader_rev567/chrome/content/bbs2chreader/log-converter/converter.xul	Mon Jun 30 17:43:48 2008
+++ bbs2chreader_rev567-patched/chrome/content/bbs2chreader/log-converter/converter.xul	Wed Jul 23 00:18:06 2008
@@ -101,8 +101,10 @@
 				var backupdir = b2rService.io.getDataDir();
 				backupdir.appendRelativePath("backup");
 				var n = 1;
-				while(backupdir.exists())
-					backupdir.appendRelativePath("../backup-" + n++);
+				while(backupdir.exists()){
+					backupdir = b2rService.io.getDataDir();
+					backupdir.appendRelativePath("backup-" + n++);
+				}
 				backupdir.create(Ci.nsILocalFile.DIRECTORY_TYPE, 0755);
 				updateStatus("バックアップフォルダを作成しました: "+backupdir.path)