The Version Plain für 1.6 b2evolution has bugs. Lacking >'s.... Nevertheless, the Version presented for demonstration is correct - only the downloadversion ist not bugy. I recommend to update the download Version. The bugs are all in the File _main.php - it is always the same fault: lacking > at the end of a div - about three of them. I will not upload the file, as you should have the correct files (demonstration-Version).

regards
Christian