Aaaah - I've done this too - I left it in a CD bin next to the checkout in Virgin Megastore Reading.

It was there for three or four hours before I realised (oops), and was still there when I got back. Apparently the staff had noticed it, decided it wasn't a bomb and left it alone completely!

Paul.

Paul Haigh, Reg. 4120
(mk1) 6GB, Blue, 00254
(mk2) 12GB, Red, 00357
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Paul Haigh, Reg. 4120 (mk1) 6GB, Blue, 00254 (mk2) 12GB, Red, 00357