I've been having issues with the wired connection on my Pi. The connection keeps dropping out and then reconnecting constantly. About half the time it'll completely drop after a few minutes of this. I've used a few power supplies now, an Asus branded supply, HTC and a Belkin USB hub (F5U234) that is reportedly verified (http://elinux.org/RPi_Powered_USB_Hubs).
The disconnections occur on both Raspbmc and Raspbian. It doesn't seem to matter what is plugged into the USB ports, disconnections happen with nothing plugged in and with two things plugged in. Although when I connect the powered USB hub via USB, the ethernet immediately goes down (and stays down).
Are these symptoms of power supply issues?