Permissions when copying to USB key

[Florence Berbain]

Hello all,

I have a USB key that is automatically detected by my Ubuntu system 
(Warty). When I copy a file that does not have executable permissions to 
the USB key, the copied file on the key is executable for the owner. 
However, I'd rather like to have the same permissions for both files.

Does anybody know where I can configure this? And is the way it works 
now the intended behaviour, for some reason?

Thanks for any help,
Florence