1.diminish the horizontal length of the caption;
Place the float in a minipage?
it is not possible to have a float inside a minipage. It's the other way round: the caption can be inside the float.
I thank both (Angus and Herbert) for your help! I have just tried the way suggested by Angus (putting the float table inside a minipage) and it works fine. Probably, my table is not a pure float, since I have selected the "here definitely placement".
Paul
