On Sun, 25 Nov 2007, Maurí­cio wrote:

> Hi,
>
> How do I prevent a paragraph to be broken between
> pages (or columns)?

Add a \vbox{....} around the paragraph. You can also use 
\framed[align=normal], or \start-stop framed, which are fancier vboxes and 
provide more control.

Aditya