transferring files between a Mac and Kubuntu

[Eric]

I've got my wife's Mac to connect to my Kubuntu 6.06 installation using 
ssh and the sshd server. On the Mac side I've been able to connect to 
Kubuntu using a program called Cyberduck.

I'm wondering if it's safe to transfer files back and forth between the 
two. I know that until recently, we couldn't write safely to some 
Windows partitions. I did transfer a program both ways. Should I not do 
that again or is it ok?

Thanks for any help you can give.


Eric Jackson