Thanks for picking up this issue. As a work-around, you can right click -> Preferences and change the shell going forward. But I agree it should default properly. Obviously it's an upstream issue, so I'll raise it there. But I'd think to the value of $SHELL (which is set by login to the entry in /etc/passwd). Or should programs actually parse /etc/passwd if $SHELL isn't set? I'm a bash user, so I never really thought about what would be the "right thing" here.
Cheers, --Barak.
