tar : unrecognized archive format

[Christ The_worm]

Hi,

I am running on FreeBSD 5.3 and did some ports and packages installation and 
everythings works fine. But ... today when i try to untar a *.tar.gz file I 
get a " tar : unrecognized archive format " error
I am still able to untar *.tgz files, but no more *.tar.gz ?!?

Did i do something wrong whitout knowing it ;-)

Thanx for your help !

Christophe

Montreal, Qc.
Canada