[georgemcbay]

Yes, it does sound like a power issue. This is pretty common on the Pi given the massive variability of USB power sources.

This page is a pretty good resource for researching community reported "known working" Pi peripherals including power sources:

http://elinux.org/RPi_VerifiedPeripherals

[X-Istence]

I'm using an Apple iPad charger... that thing has plenty of power.