I haven't been keeping up to the news so I'm not really up to date regarding the latest tech news. I remember from a while ago that there is a problem with Mac and the WD drives that have free-fall sensors/lock on it. I've looked at a few reviews on Amazon about problems with Lion (presumably because of the conflict free-fall and the one built within Macs) and the drives. Could anyone advise? (Also could you guys use Amazon.co.uk as the reference for the drives?) (I also remember it being a particular model number, I think, the back 4 letters / numbers that indicate whether it has a free-fall sensor or not.) Thanks in advance.