gtar: ambiguous package

[Max Power]

Hi guys, and wishes for the new release, Thank You Theo.

Installing gtar ask me:
Ambiguos: choose package for gtar
a      0:<None>
         1: gtar-1.28p1
         2: gtar-1.28p1-static
Your choice:

Ok, but differece between 'normal' and 'static'...? 
Thanks.