Sadly my faithful Canoscan LIDE 25 has conked. I thought it was just a driver issue with Lion on my mac mini, but it has now given up the ghost when plugged into my Snow leopard macbook too.
I'll give it one last bash using a PC, and then I'm afraid I'll have to give up today. I'll probably be able to pick up another scanner tomorrow, but maybe not.
Apologies for the delay