I had my MacBook Pro (15 inch late 2008 model) in my lap with a USB pendrive in one of the USB sockets (the one closer to the MagSafe), and I wanted to put it on the chair next to me and I accidentally bumped the USB drive into one of the chairs in front of me. The bump was very gentle, and it didn't even interrupt the file copy that I was doing from my computer to the USB stick. However, since then, I noticed that things that I plug into that USB port sometimes disconnect if I move the cable a bit. Sometimes I can move the cable around a lot without any disconnection, but sometimes a very gentle move will cause whatever is plugged into it to loose communication. This has happened with two separate devices, both on the same USB port (a pen tablet and an external hard drive). Basically, I'm wondering whether it is possible that such a gentle bump can break something inside the USB socket, or whether it can break the soldering that connects it to the logic board... My MacBook Pro is no longer under warranty, so can anyone give me an idea about how much it might cost to get this repaired at an Apple store? Thanks.