(Ted Harding) Ted.Harding@wlandres.net [...]
When I plug this in (Debian Lenny) I get a pop-up which says:
Cannot mount volume Invalid mount option when attempting to mount the volume 'My Passport'
dmesg | tail -35 gives:
Try /var/log/messages and /var/log/daemon to see if it traps what command it is trying to run.
I suspect it's udev or hal kicking in and trying to mount it as vfat instead of ntfs. I think they mount things under /media so that may explain the .hal-* file.
If so, you need to find the rule and add a more specific one for that disk (probably its UUID or label or something) to mount it as ntfs instead.
Hope that points you in roughly the right direction,