I follow this thread and thankfull for good and hard working.
I really thankfull as a nubie and "lack of programming" person.
I apply this hack to my FB 1.0.4 on joomla 1.0.12 and CB 1.1.1 and I found MERGE and SPLIT menu/link/button doesn't appears on ALL THREAD especially older THREAD than time when I insert the codes.
I also found on some long posts (older and more than 2 pagination) the MERGE and SPLIT menu/link/button not shows on every post (in same Thread)

This is one of screen shot :


Did I miss something?