When my Droid is plugged in to my computer with the USB cable, it's frequently (like sometimes 3 times/minute) disconnecting and reconnecting. I know because I hear the USB noise on the computer, and the phone rings a notification every time. It's still charging the whole time, so I don't know what difference that makes. The cable is secure, the phone is just sitting still every time it does it.
I can never do a large file transfer without babysitting it in case it disconnects, and I really hate it. Does anyone else have this problem?