Character[] field value are truncated

Inserting a value using pgadmin3 Data Edit Grid into a Character(xx)[] field results in a truncated string.
Value I am trying to insert is {Casa,Home} but when I save the row only the first chr are inserted. The row appears:
{C       ,H.       }
 

Ubuntu 14.04 x86_64 
Pgadmin 3 rev 1.18.1 from repos

Is this a bug or am I missing something?

Thanks in advance 
Emanuele
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