Problema con footnote (lunga)

Ciao,

c’è qualche limitazione sulla lunghezza di una nota a pie di pagina? Ne ho scritta una un pò lunga e mi becco il seguente errore:

`
! File ended while scanning use of \@footnotetext.

\par
<*> \nonstopmode\input miodoc.tex

I suspect you have forgotten a `}', causing me
to read past where you wanted me to stop.
I'll try to recover; but if the error is serious,
you'd better type `E' or `X' now and fix your file.

! Emergency stop.
<*> \nonstopmode\input miodoc.tex

*** (job aborted, no legal \end found)

Here is how much of TeX's memory you used:
8278 strings out of 495061
141256 string characters out of 1182621
197939 words of memory out of 3000000
11254 multiletter control sequences out of 15000+50000
14386 words of font info for 56 fonts, out of 3000000 for 9000
28 hyphenation exceptions out of 8191
47i,10n,49p,1471b,668s stack positions out of 5000i,500n,10000p,200000b,50000s
! ==> Fatal error occurred, no output PDF file produced!
`

Grazie, ciao!

Dimenticavo di dire che ho controllato le parentesi e ci sono tutte.