Re: paragraph-start and fill-paragraph in texinfo-mode

[Richard M. Stallman]

    Tracing fill-paragraph shows that forward-paragraph is not working
    properly, perhaps due to paragraph-separate/paragraph-start not being
    defined properly.

That definition is strange--I suggest you figure out where it comes from.

    In a texinfo buffer (the buffer-local variable) paragraph-start is 
    defined as 
      "\\|@[a-zA-Z]*[ \n]\\|[  ]*\\(//+\\|\\**\\)[     ]*\\|^\f"

Here's what I see when I visit a file in Texinfo mode
after emacs -Q.

    "\\|@[a-zA-Z]*[ 
    ]\\|[       ]*$"