I purchased a new scanner to use with my new mbp. The canon lide 25, for simple tasks. I installed the driver and I discovered that the scanner operates properly only when it is connected almost directly to the macbook! Why this happens? I use to have a (no1) usb hub attached to my mbp and another one (no2) to attach all my peripherals. I would like to attach the no2 usb hub to the no1 usb hub in order to use the peripherals. Printer works ok with these connection. I had never had such problems in windows (usb hub connect to usb hub and then to a computer) and I cannot understand why the scanner wants such a specific(almost direct) connection to mbp. If I do not connect the scanner to no1 hub, then an error appears saying I cannot use the scanner etc. Is it normal? My room and equipment are in such a way that these hubs help me a lot. I hope you could tell me a solution.